The Kahn-Freund Family

The first component of the surname, Kahn, deserves careful examination. In Ashkenazi Jewish onomastics, Kohen gave rise to a vast family of forms: Cohen, Kohn, Kahn, Kahane, Katz (an acronym for Kohen Tzedek, "priest of justice"), or even Kaplan in Slavic regions. The form Kahn, particularly widespread in the Rhineland, Alsace, and German-speaking countries, constitutes the Germanic adaptation of the title — the German word Kahn meaning, moreover, "barge," which allowed many families, upon the obligatory adoption of surnames, to mask behind a banal German word an ancient sacerdotal identity.

This logic of double reading — a profane German word concealing a sacred Hebrew title — is characteristic of the period of emancipation. The bearing of a name indicating sacerdotal origin was no accident: it was a matter of preserving, within the civil and profane sphere imposed by the State, a religious and statutory identity transmitted from father to son. For the status of Kohen is neither acquired nor chosen: it is received through patrilineal descent, and it carries in synagogal life precise prerogatives — the first call-up to the reading of the Torah, the pronouncement of the priestly blessing (Birkat Kohanim), as well as specific ritual prohibitions, notably with respect to contact with the dead and to marriage.

The tradition according to which families bearing a name derived from Kohen would effectively descend from Aaron falls, for the historian, within the realm of transmitted Memory rather than documentary proof: no continuous genealogical chain could possibly reach back to Antiquity. However, this consciousness of sacerdotal belonging has durably structured the identity and practices of the families in question, and it is in this sense that one must understand the notice qualifying the Kahn-Freund as a "priestly family." The study of medieval and modern Jewish family structures shows, moreover, how much inherited status and kinship networks oriented alliances, communal functions, and lineage memory [Ray, 2020]. If these works focus principally on the Sephardic world, the principle of patrilineal transmission of sacerdotal status holds, identically, for the entirety of the Jewish world, both Ashkenazi and Sephardic.

As for the second element, Freund, it belongs to the large category of "ornamental" or affective names adopted by German Jews. Its juxtaposition with Kahn in a compound surname suggests, according to all likelihood, the fusion of two lineages through matrimonial alliance — a practice attested in the German Jewish bourgeoisie of the nineteenth century, concerned to preserve the memory of the two united families. The compound name thus becomes itself an act of genealogical Memory. In this, the surname Kahn-Freund embodies a profoundly Jewish value: Memory as a debt to the living and the dead, the refusal to let a lineage disappear into silence.

It is in Frankfurt am Main that the Kahn-Freund lineage enters documented history. This free city of the Empire was home to one of the oldest and most prestigious Jewish communities in Germany, whose origins trace back to the Middle Ages and whose Judengasse — the Jews' alley — was, from the sixteenth to the nineteenth century, one of the intellectual and financial hearts of European Jewry. From this community emerged dynasties as considerable as the Rothschilds, the Speyers, and the Oppenheims.

At the birth of Otto Kahn-Freund, in 1900, the Jewish community of Frankfurt was at its height. Emancipation, acquired over the course of the nineteenth century and consecrated by the Constitution of the German Empire, had enabled the Jewish bourgeoisie to become fully integrated into the city's economic, professional, and cultural life. Frankfurt was then a major center of Wissenschaft des Judentums — the "science of Judaism" — of liberal Judaism as well as neo-orthodoxy inspired by Samson Raphael Hirsch, and a leading university hub: the Goethe University was founded there in 1914, notably thanks to the patronage of Jewish families.

In this milieu, cultivated Jewish families combined a fidelity to religious tradition — all the more marked when they were conscious of a sacerdotal ancestry — and a resolute adherence to the ideals of Bildung, this German humanistic and juridical culture. It is precisely this double belonging that characterizes the Kahn-Freund family: rooted in the memory of priesthood, and oriented toward the professions of law and knowledge. The historiography of the Jewish family emphasizes that, in these societies, the home remained the primary place of transmission, articulating inherited status, religious education, and the ambition for integration [Rozen, 2014].

It must be said, however, to remain prudent: the precise ascending genealogy of the Kahn-Freund family beyond Otto's generation is not, to this day, established by publicly accessible and verified documentation. The registers of the Israelite community of Frankfurt, partially preserved, would constitute the source most capable of reconstituting it; in the absence of their direct examination, we shall refrain from asserting lineages that the archive does not yet authorize us to trace.

Otto Kahn-Freund was born on November 17, 1900 in Frankfurt am Main, into that cultivated Jewish bourgeoisie we have just described. He completed his legal studies at the great German universities of the Weimar Republic — a time when German legal science, both rigorous and traversed by intense theoretical debates, was shining across all continental Europe. There he received the classical dogmatic training of the German jurist, combining Roman law, civil law, and reflection on the foundations of the legal order.

In the final years of the Weimar Republic, Otto Kahn-Freund rose to the judiciary and became a judge at the labor court in Berlin (Arbeitsgericht). It was there that his decisive vocation for labor law was forged, a discipline then young, born of industrialization and the social conquests of the postwar period. The Weimar Republic had indeed established an advanced system of labor relations, founded on the recognition of trade unions, collective bargaining, and labor jurisdiction. Kahn-Freund was both an actor and a frontline observer of this system.

His German career experienced a brutal rupture, symptomatic of its time. In 1933, shortly after Adolf Hitler came to power, Otto Kahn-Freund, as a labor judge, delivered a ruling unfavorable to the interests of the new regime — a judgment recognizing rights to employees dismissed from the public radio station. This independence cost him his position. Jewish and reputed to be hostile to National Socialism, he was struck, like all Jewish civil servants, by the Law for the Restoration of the Professional Civil Service of April 1933, which excluded Jews and opponents from German administration and the judiciary. His dual belonging — as a Jew and as a magistrate concerned with legality — made him one of countless victims of the Reich's consolidation of power, and forced him into exile.

In the Jewish prophetic tradition, justice — mishpat — is not an abstract concept: it demands of those who hold it that they exercise it truly, even at the cost of their own security. Kahn-Freund's gesture in 1933, delivering a judgment in accordance with law despite the pressures of mounting power, is rooted in this deep fiber: tsedaqah, righteous justice, as a non-negotiable imperative. German judicial archives confirm this fact; the Jewish tradition gives it its moral weight.

In 1933, Otto Kahn-Freund left Germany for the United Kingdom, joining the stream of intellectuals, scholars, and Jewish jurists whom Nazi barbarism cast onto the roads of emigration. London became, for this generation, a land of welcome and renewal: the London School of Economics and Political Science (LSE), in particular, welcomed many of these refugees and became a centre of innovation in the social and legal sciences.

Exile imposed on the jurist a genuine intellectual renaissance. Trained in German law, Kahn-Freund had to appropriate the system of British common law, whose foundations — the supremacy of case law, mistrust of codification, a voluntarist and contractual conception of labour relations — differed radically from continental tradition. Far from suffering this uprootedness, he made it the matrix of an original body of work. Resuming studies in English law, he was admitted to the bar, then joined the LSE where he taught law, becoming one of the undisputed masters of the discipline.

It was during this London period that Kahn-Freund developed his founding conception of British labour law. He forged in particular the influential notion of "collective abstention" (collective laissez-faire), theorizing the then distinctive feature of the British system: a labour law resting not on the State's legislative intervention, but on the autonomy of the social partners and voluntary collective negotiation between unions and employers. This analysis, which made collective contractual freedom the pivot of professional relations, became a canonical framework for understanding English specificity and lastingly marked teaching and doctrine.

Naturalized as a British citizen, Otto Kahn-Freund thus embodies the figure of the exile who, far from withdrawing, refounded an entire discipline in the host country. His path illustrates the way in which the forced emigration of German Jewish jurists profoundly enriched Anglo-Saxon legal thought in the twentieth century, transplanting onto British soil the conceptual rigour and systematic sense inherited from the German tradition. He is, in this measure, the unwilling heir to a long Jewish tradition: that of the exile who carries with him, in his baggage reduced to the essentials, intact knowledge, and who offers it to the society that welcomes him. This relation to the foreigner — to receive welcome with gratitude and to repay it through intellectual gift — is one of the best attested virtues of the Jewish diaspora throughout the ages.

The year 1972 marked the culmination of several decades of reflection: Otto Kahn-Freund delivered the Hamlyn Lectures (Hamlyn Lectures), this annual series of public lessons on British law established by the bequest of jurist Emma Warburton Hamlyn, of which he constituted the twenty-fourth series. From these lectures emerged the book _Labour and the Law_, published that same year in London by Stevens & Sons, under the auspices of the Hamlyn Trust, in a volume of eleven prefatory pages and two hundred seventy pages. A second revised edition appeared in 1977, testifying to the enduring value of the work and the necessity of updating its analysis in light of the legislative transformations that had occurred in the meantime in British labour law.

Labour and the Law is not a simple manual or a collection of case law: it is a work of fundamental legal thought. Kahn-Freund deploys a central thesis on the nature and limits of the role that law can and should play in labour relations. His starting point is a deep conviction, forged both in the experience of the Berlin labour court and in observation of the British system: law is a technical instrument in service of social forces that preexist it and exceed it. The law does not create labour relations; it regulates them, frames them, or liberates them, but it cannot substitute for the absence of powerful and autonomous workers' organisations. It is this conviction—that social justice in the workplace depends first on the balance of collective forces, and not solely on the virtue of the legislator—that structures the entire work.

The architecture of the book articulates two major axes. The first is the analysis of collective labour law: unions, collective bargaining, collective agreements, their legal scope or their deliberately extra-legal status in the British system. The second is the examination of individual labour law: the employment contract, working conditions, freedom of association, the right to strike. Kahn-Freund brings together a palette of continental comparisons—French law, German law, the doctrine of Camerlynck, the great institutions of the International Labour Organization—that make the work a permanent dialogue between the English model and its European counterparts.

One of the most original contributions of the book is the distinction, which became classical in labour law literature, between the auxiliary functions and the restrictive functions of law in labour law. In its auxiliary function, law supports and facilitates the exercise of trade union freedom and collective bargaining: it guarantees the legality of strikes, recognizes workers' organisations, protects shop stewards. In its restrictive function, it sets limits—on the practices of unions and employers alike—in the name of public order or the protection of third parties. This conceptual pair, of remarkable pedagogical clarity, carried reflection on labour law far beyond British borders.

The second edition of 1977 came in a particularly turbulent context of British social history. The Industrial Relations Act of 1971, attempted reform by the Heath government, had sought to make collective agreements legally binding and to regulate the right to strike—an attempt that had met with the firm opposition of the unions and was ultimately repealed in 1974. Kahn-Freund, without calling into question the foundations of his vision, updated his analysis in the light of these upheavals, testifying to a thought constantly engaged with institutional reality. The date of 1977 is, in this respect, symbolically powerful: two years before Kahn-Freund's death and on the eve of the Thatcherite transformations that would profoundly reshape British labour law, the work presents itself as the intellectual testament of a jurist who had seen the birth and flourishing of the great age of the English labour movement.

It must be emphasized here the ethical dimension of this work. Kahn-Freund was not a purely technical jurist: he was convinced that labour law had a mission of social justice, and that this mission could only be realized if law humbly recognized its own limits in the face of the reality of power relations. This stance—the humility of the scholar who refuses to overestimate the scope of his tools—joins a profoundly Jewish value: the awareness that the Law, central though it may be, is only an instrument in service of a higher justice, and that its application must always be illuminated by practical wisdom, sekhel, and a sense of human realities. The jurist from Frankfurt, distant heir of priests and sages, here rejoined a tradition in which knowledge of the rule has meaning only if it serves the good of concrete persons.

The crowning achievement of Otto Kahn-Freund's career was his appointment in 1964 to the Chair of Comparative Law at the University of Oxford (Chair of Comparative Law), where he was also elected fellow of Brasenose College — that same university whose Bodleian Library preserves, among its collections, the most precious Hebrew manuscripts in Europe. This appointment consecrated his status as the greatest specialist in comparative law in the United Kingdom and inscribed him in the prestigious tradition of Oxonian scholarship.

At Oxford, Kahn-Freund expanded his work on labour law towards a more general reflection on comparative methodology. His most celebrated contribution in this field is his reflection on the concept of "legal transplants" (legal transplants) — that is, the transfer of institutions or legal rules from one national system to another. In a lecture that became classic, he argued that the possibility of transplanting a legal institution from one country to another depended less on technical factors than on the political, social and institutional context; certain rules, deeply linked to the power structure of a given society, could not be transplanted without rejection. His own trajectory — that of a German jurist transplanted into the world of common law — gave this reflection an obvious existential depth. The man who had himself experienced uprooting and reimplantation understood, from within, what it means to encounter two legal orders, and what the passage from one to the other costs and produces.

Between 1965 and his retirement, Kahn-Freund was elected fellow of the British Academy (FBA). He became bencher of the Middle Temple in 1969, Queen's Counsel in 1972, and was made a knight bachelor in 1976 — distinctions that attest to public recognition extending well beyond academic circles. He also received multiple honorary doctorates, in Great Britain as well as on the continent. A living bridge between continental law and English law, between Germanic tradition and British thought, he became one of the principal architects of European comparative social law, laying the foundations for a transnational legal dialogue that prefigured the subsequent harmonisation of social law within the European Community.

Kahn-Freund's comparative work thus joined another dimension of Labour and the Law: the conviction that no legal culture can be enriched except by honestly confronting others. This openness to otherness — regarding the other system not as a model to copy or as an oddity to reject, but as a mirror in which to better understand one's own law — is a form of the relation to the foreign that the Jewish tradition has cultivated through centuries of dispersion. Diaspora as a school of comparison: the exiled jurist who becomes the master of comparative method does not invent by chance; he fulfils a vocation implicit in his history.

Otto Kahn-Freund died in 1979. His legacy remains considerable: generations of trained jurists, founding doctrines still taught, and the demonstration that exile, far from sterilising thought, can instead carry it to a new fecundity.

There is, in the destiny of the Kahn-Freund lineage, a fertile tension that this chapter proposes to illuminate: that between the priestly memory inscribed in the name and the resolutely secular destiny of its most famous representative. The ancient Kohen was the guardian of the sanctuary, the minister of sacrifice, the holder of an authority founded on the transmission of blood and on knowledge of the Law. Some two millennia later, his distant presumed heir became the guardian of another order — that of labour law —, ministering no longer to a Temple but to social justice, holder of an authority founded no longer on blood but on knowledge and on the rigour of analysis.

This translation of the sacred into the secular, of priesthood into magistracy and teaching, is not peculiar to the Kahn-Freund: it constitutes one of the leading threads of modern Jewish history, where emancipation transformed a religious elite into an intellectual and professional elite. But the name remains: Kahn continues to signal, at the very heart of the most profane civil sphere — a Berlin tribunal, an Oxford chair —, the memory of an immemorial vocation. The archive confirms here the persistence of the name; tradition alone reveals its hidden meaning.

Yet it must be said with honesty: if the priestly claim is inscribed in the patronym and forms an integral part of the family's claimed identity, it cannot be "proved" in the sense that the historian understands documentary proof. It is precisely this that makes it an intersection: a point where transmitted memory (the descent from Aaron) and established history (the name Kahn attested, the documented career) answer to each other without merging. The consciousness of an inherited status remains, in Jewish societies, a major social fact, independently of its absolute genealogical verifiability [Ray, 2020].

Perhaps the most illuminating dimension of this sacred-secular tension is that of the relationship to the Law. For the Kohen of the Temple, the Law — the Torah and its ritual prescriptions — was the very object of his ministry: he guaranteed its application through sacrifice, purification, the discernment of the pure and the impure. For Otto Kahn-Freund, the Law — that of labour, collective agreements, relations of economic force — was likewise the central object of a life. But his conception of the Law was profoundly non-formalist: the legal rule has value only if it articulates itself with the social realities it claims to govern. This mistrust of abstract legalism, this requirement that the rule truly serve the justice of persons, rejoins an ancient talmudic tradition: one that refuses to venerate the letter when it betrays the spirit, and which makes living interpretation — midrash, pesak halakha — the heart of juridical transmission.

The name Kahn-Freund thus bears, in two words, the entire dialectic of modern Jewishness: fidelity to a sacred origin and engagement in the world.

The Kahn-Freund lineage offers, in striking summary, an exemplary figure of the destiny of German Jewry in the twentieth century. Its very name condenses two strata of Jewish history: the immemorial stratum of the priesthood, borne by the element Kahn, and the modern stratum of emancipation and bourgeois integration, borne by the element Freund. From this double memory emerges the trajectory of Otto Kahn-Freund, born in Frankfurt at the apex of the German Jewish community, magistrate of the Weimar Republic, exiled by Nazism in 1933, and refoundator, on British soil, of an entire legal discipline.

His work — foundation of British labour law, theory of collective abstention, reflection on legal transplantations, Oxonian magistracy of comparative law, and finally Labour and the Law (1972, 2nd ed. 1977) as synthesis of a lifetime of thought — attests that exile, this cardinal trial of Jewish history, can transform into a source of creation. Like so many Jewish scholars driven from Germany, Kahn-Freund transplanted into his host country the fruits of a legal culture forged in German rigor, contributing to shape the thinking of European social law. The irony of history willed that this man, whose native country had abolished all legal protection of Jewish workers, should construct in London and Oxford the most influential theory of legal protection of workers in general.

Among all the values that the history of Jewish tradition has borne, it is undoubtedly that of justice — mishpat and tsedaqah — that the Kahn-Freund lineage will have best expressed: not justice as abstraction, but as concrete, daily, institutional commitment. Justice rendered in 1933 at the peril of a career, justice theorized in the labour courts of Berlin, justice constructed in the lecture halls of the LSE and Oxford, justice offered in the Hamlyn lectures to a British audience. And this justice, as Kahn-Freund conceived it, was inseparable from a fundamental humility: the conviction that law is merely a tool, that legislation is valid only if it serves real persons, that the jurist must always subordinate his system to the demands of the living. This posture joined, beyond generations and oceans of history, the Talmudic requirement according to which knowledge has meaning only if it contributes to the welfare of the community.

It remains, at the end of this work, to measure the share of the established and that of the transmitted. The career of Otto Kahn-Freund is solidly documented by university archives, scientific publications, and British institutional memory. By contrast, the ascending genealogy of the family, and singularly the priestly chain evoked by his name, belong to a memory whose historical veracity escapes proof. It is this epistemological honesty — distinguishing what one knows from what one believes, the archive from tradition — that constitutes the guiding principle of this Great Book. The name Kahn-Freund thus remains as a palimpsest: beneath the twentieth-century jurist, the echo of an ancient priest; beneath the British citizen, the memory of a Jew of Frankfurt. And in this palimpsest, an inscription legible to whoever knows how to decipher both layers at once: that of justice as an inherited vocation, and that of justice as an accomplished work.