The Great Book — Kahn-Freund

Introduction

The compound name Kahn-Freund belongs to that singular category of Ashkenazic patronymics which aggregate two lineages into a single term, bearing witness to a strategy of family identity characteristic of Germanic Jewry in the eighteenth and nineteenth centuries. The first element, Kahn, is one of the German vernacular forms of the priestly title Kohen (כֹּהֵן), designating the presumed descendants of Aaron, brother of Moses, and thus denoting membership in the caste of priests of the Temple of Jerusalem. The second, Freund ("friend" in German), belongs by contrast to the most widespread class of German Jewish names adopted at the time of emancipation, when imperial edicts and the legislation of the German states imposed upon Jewish families the bearing of a fixed, civil patronymic.

The history of this lineage, as it is accessible to us, can only be documented with certainty from the turn of the twentieth century, through the figure of its most illustrious representative, Otto Kahn-Freund (1900–1979), a jurist born in Frankfurt-am-Main, exiled to London in 1933, and recognized as one of the founders of modern British labor law and European comparative social law. Beyond this individual, the present work undertakes to situate the family within the broader fabric of Rhenish and Frankfurt Jewry, whose history is throughout attested by municipal, communal, and university archives.

This Great Book scrupulously distinguishes, in keeping with its method, between what belongs to transmitted Memory — the tradition of a priestly lineage, the consciousness of belonging to the Kohanim — and what belongs to History as established by civil status records, communal registers, and scholarly publications. As studies on the social and family organization of Jewish societies remind us, the family there constitutes less a simple biological unit than an institution bearing status, Memory, and transmission, in which the name itself serves as archive [Rozen, 2014]. It is in this spirit that we approach the Kahn-Freund lineage: a name in which one may read at once the immemorial claim to the priesthood and the very precisely dated inscription within the juridical modernity of Europe.

Chapter 1: The Name and Priestly Claim

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 of Kohen Tzedek, "priest of justice"), and Kaplan in Slavic regions. The form Kahn, particularly widespread in the Rhineland, in Alsace, and in German-speaking lands, constitutes the Germanic adaptation of the title — the German word Kahn meaning "boat," which allowed many families, at the time of compulsory surname adoption, to conceal an ancient priestly identity behind an ordinary German word.

This logic of the double reading — a profane German word concealing a sacred Hebrew title — is characteristic of the emancipation period. The bearing of a name indicating priestly origin was not a matter of chance: it served to preserve, within the civil and secular 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 within synagogue life precise prerogatives — the first ascent to the reading of the Torah, the pronouncing of the priestly blessing (Birkat Kohanim), as well as specific ritual prohibitions, notably regarding contact with the dead and marriage.

The tradition according to which families bearing a name derived from Kohen would effectively descend from Aaron belongs, for the historian, to transmitted Memory rather than to documentary proof: no continuous genealogical chain could reach back to Antiquity. Nevertheless, this consciousness of priestly belonging has durably structured the identity and practices of the families concerned, 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 shaped alliances, communal functions, and lineage memory [Ray, 2020]. While this scholarship bears primarily on the Sephardic world, the principle of patrilineal transmission of priestly status applies, identically, to the entirety of the Jewish world, Ashkenazi as well as Sephardic.

Chapter 2: Frankfurt Jewishness, Soil of the Lineage

It is in Frankfurt am Main that the Kahn-Freund lineage enters documented history. This free imperial city was home to one of the oldest and most prestigious Jewish communities in Germany, whose origins stretch back to the Middle Ages and whose Judengasse — the Jews' Lane — 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 zenith. Emancipation, achieved over the course of the nineteenth century and enshrined in the Constitution of the German Empire, had enabled the Jewish bourgeoisie to integrate fully into the economic, professional, and cultural life of the city. Frankfurt was at that time a major centre of the Wissenschaft des Judentums — the "science of Judaism" —, of liberal Judaism as well as of the neo-orthodoxy inspired by Samson Raphael Hirsch, and a leading university hub: the Goethe University was founded there in 1914, thanks in no small part to the patronage of Jewish families.

In this milieu, educated Jewish families combined a fidelity to religious tradition — all the more pronounced when they were conscious of a priestly lineage — with a resolute adherence to the ideals of Bildung, that German humanist and juridical culture. It is precisely this dual belonging that characterises the Kahn-Freund family: rooted in the Memory of the priesthood, and oriented toward the professions of law and learning. The historiography of the Jewish family emphasises that, in these societies, the home remained the primary site of transmission, articulating inherited status, religious education, and the aspiration toward integration [Rozen, 2014].

It is nonetheless wise to remain cautious: the precise ascending genealogy of the Kahn-Freund family beyond Otto's generation has not, to this day, been established through publicly accessible and verified documentation. The records of the Israelite community of Frankfurt, partially preserved, would constitute the most capable source for reconstructing it; in the absence of their direct examination, we shall refrain from affirming filiations that the archive does not yet permit us to trace.

Chapter 3: Otto Kahn-Freund, Formation of a German Jurist

Otto Kahn-Freund was born on 17 November 1900 in Frankfurt am Main, into that cultivated Jewish bourgeoisie we have just described. He pursued legal studies at the great German universities of the Weimar Republic — a moment when German legal scholarship, at once rigorous and animated by intense theoretical debate, cast its influence across the whole of 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 entered the judiciary and became a judge at the Berlin labour court (Arbeitsgericht). It was there that his decisive vocation for labour law was forged — a discipline then still young, born of industrialisation and the social gains of the post-war era. The Weimar Republic had indeed erected an advanced system of industrial relations, founded on the recognition of trade unions, collective bargaining, and labour jurisdiction. Kahn-Freund was both an actor and a front-line observer of this system.

His German career suffered an abrupt rupture, symptomatic of his era. In 1933, shortly after Adolf Hitler's rise to power, Otto Kahn-Freund, sitting as a labour judge, handed down a decision unfavourable to the interests of the new regime — a judgment recognising the rights of employees dismissed from the public radio station. This independence cost him his position. Jewish and known to be hostile to National Socialism, he was struck, along with all Jewish civil servants, by the Law for the Restoration of the Professional Civil Service of April 1933, which excluded Jews and political opponents from the German administration and judiciary. His dual position — as a Jew and as a magistrate committed to the rule of law — made him one of the countless victims of the Gleichschaltung of the Reich, and forced him into exile.

Chapter 4: The London Exile and the Refounding of a Work

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

Exile imposed upon the jurist a true intellectual rebirth. Trained in German law, Kahn-Freund had to make his own the British common law system, whose foundations — the primacy of case law, a mistrust of codification, a voluntarist and contractual conception of labour relations — differed radically from the Continental tradition. Far from merely enduring this uprooting, he made it the matrix of an original body of work. Resuming his legal studies in English law, he was called 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 elaborated his foundational conception of British labour law. He forged in particular the influential notion of "collective abstention" (collective laissez-faire), theorising what was then the distinctive feature of the British system: a labour law resting not on legislative intervention by the State, but on the autonomy of the social partners and voluntary collective bargaining between trade unions and employers. This analysis, which made collective contractual freedom the pivot of industrial relations, became a canonical framework for understanding English specificity and left a lasting mark on teaching and doctrine.

Naturalised as a British citizen, Otto Kahn-Freund thus embodies the figure of the exile who, far from withdrawing into himself, refounds an entire discipline in the host country. His trajectory 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 sensibility inherited from the German tradition.

Chapter 5: Oxford, Comparative Law and the Theory of Transplants

The crowning achievement of Otto Kahn-Freund's career was his appointment, in 1964, to the University of Oxford's Chair of Comparative Law, where he succeeded eminent figures in the field. This transition from the LSE to Oxford consecrated his status as the foremost specialist in comparative law in the United Kingdom, and inscribed him within the prestigious tradition of Oxonian scholarship — that same university whose Bodleian Library holds, among its collections, the most precious Hebrew manuscripts in Europe.

At Oxford, Kahn-Freund expanded his work from labour law toward a broader reflection on comparative method. His most celebrated contribution in this domain is his meditation on the concept of "legal transplants" — that is, the transfer of legal institutions or rules from one national system to another. In a lecture that has since become a 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 bound 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 the common law — lent this reflection an obvious existential depth.

His authority was recognised by the highest academic and public distinctions: he was made a knight bachelor, elected a Fellow of the British Academy, and received multiple honorary doctorates, both in Great Britain and on the Continent. A living bridge between continental law and English law, between the Germanic tradition and British thought, he became one of the principal architects of European comparative social law, laying the foundations of a transnational legal dialogue that prefigured the subsequent harmonisation of social law within the European Community.

Chapter 6: Priestly Memory and Secular Destiny

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

This translation from the sacred to the secular, from the priesthood to the bench and the lectern, is not peculiar to the Kahn-Freunds: it constitutes one of the guiding threads of modern Jewish history, in which emancipation transformed a religious elite into an intellectual and professional elite. But the name endures: Kahn continues to signal, at the very heart of the most thoroughly 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.

It must nonetheless be restated with honesty: while the sacerdotal claim is inscribed in the family name and forms an integral part of the family's avowed identity, it cannot be "proved" in the sense in which the historian understands documentary proof. This is precisely what makes it an intersection: a point where transmitted memory (the descent from Aaron) and established History (the attested name Kahn, the documented career) speak to one another without merging. The consciousness of an inherited status remains, in Jewish societies, a major social fact, independently of its absolute genealogical verifiability [Ray, 2020]. The name Kahn-Freund thus carries, in two words, the entire dialectic of modern Jewish identity: fidelity to a sacred origin and engagement with the age.

Conclusion

The Kahn-Freund lineage offers, in striking miniature, an exemplary figure of the fate of Germanic Jewry in the twentieth century. Its very name condenses two strata of Jewish history: the immemorial stratum of the priesthood, carried by the element Kahn, and the modern stratum of emancipation and bourgeois integration, carried 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, a magistrate of the Weimar Republic, exiled by Nazism in 1933, and the refounding figure, on British soil, of an entire legal discipline.

His work — the founding of British labour law, the theory of collective abstention, reflection on legal transplants, the Oxonian magisterium of comparative law — attests that exile, that cardinal ordeal of Jewish History, can be transmuted into a source of creation. Like so many Jewish scholars driven from Germany, Kahn-Freund transplanted into his country of refuge the fruits of a millennial legal culture, contributing to shaping the thought of European social law.

What remains, at the close of this work, is to weigh what has been established against what has been transmitted. The career of Otto Kahn-Freund is solidly documented by university archives, scholarly publications, and British institutional memory. The ascending genealogy of the family, however, and most particularly the priestly chain evoked by his name, belong to a Memory whose historical veracity lies beyond proof. It is this epistemic 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 endures as a palimpsest: beneath the jurist of the twentieth century, the echo of an ancient priest; beneath the British citizen, the Memory of a Jew from Frankfurt.