Chapter 4 charts a biography of Kant’s printed authorial name, ‘I. Kant’, so as to disclose its ethical function in late eighteenth-century Germany. Drawing on Michel Foucault’s and Roger Chartier’s studies of the materialities of authorship, I consider uses of the authorial name at the rhetorical level of Kant’s 1785 essay alongside its textual and typographical displacements, both within and outside the May 1785 issue of the Berlinische Monatsschrift, and during and beyond the author’s lifetime. In so tracing the anthumous and posthumous movements of ‘I. Kant’, I clarify the authorial name’s role in implementing an ethical author-function that Kant understood to be responsive to the demands of enlightenment practice. I contend that Kant not only recognised the importance of printed authorial names to the enactment of authorial responsibility but further so deployed his own authorial name as to hold himself and others accountable for the print publications that contributed to the public discourse in his time. I argue that this ethically and socially concerned author-function in the German Enlightenment discloses the limits of copyright’s proprietary understanding of authorship and its material constitution.