| Jacob Samuel Speyer | |
| Birth Date: | 20 December 1849 |
| Birth Place: | Amsterdam, Netherlands |
| Death Place: | Leiden, Netherlands |
| Thesis Title: | Specimen literarium inaugurale de ceremonia apud Indos, quae vocatur jātakarma |
| Thesis Url: | https://babel.hathitrust.org/cgi/pt?id=uc1.$b108145&view=1up&seq=9 |
| Thesis Year: | 1874 |
| Workplaces: | |
| Notable Students: | Johan Huizinga |
Jacob Samuel Speyer (20 December 1849 – 1 November 1913) was a Dutch philologist and translator from Sanskrit.
Born to a Jewish family in Amsterdam, Jacob Samuel Speyer first attended the Gymnasium before joining the Athenaeum Illustre at the age of not yet 16. He afterwards studied classics at Amsterdam for three years, and then Sanskrit at the University of Leiden, from where he awarded a Ph.D. on 21 December 1872.
Speyer thereafter officiated as teacher at Hoorn and (1873–1888) at the gymnasium of Amsterdam. On 15 October 1877, he was appointed lecturer in Sanskrit and comparative philology at the University of Amsterdam, and he was about to receive a professorship there when he was called to Gröningen as professor of Latin in December 1888. He held this chair until 20 March 1903, when he was appointed to succeed his former teacher Hendrik Kern as professor of Sanskrit at the University of Leiden.
Among other publications, Speyer was the author of an English translation of the Jatakamala, which appeared as the first volume of Max Müller's Sacred Books of the Buddhists, as well as an English version of the Avadanasataka. He was a member of the Royal Academy of Arts and Sciences from 1889,[1] and a knight of the Order of the Netherlands Lion. From 1893 to 1904 he was editor of the Museum.