Head of the community of Troyes, France; lived about the middle of the twelfth century. He was a contemporary of Rabbenu Tam. The influence that he exercised at Troyes gave rise to a somewhat curious legal incident. Eleazar ha-Nadib (the word nadib denotes a Jewish Mæcenas), against whom he had brought an action, demurred to appearing before the rabbinical court at Troyes; and, being supported by Isaac ben Samuel of Dampierre, had his case referred to another tribunal (Gross, "Gallia Judaica," pp. 165, 239). YomṬob ha-Nadib, the son of Eleazar, being placed in a similar position, also refused to be judged at Troyes, and was sustained in his contention by Judah Sire Leon of Paris ("Rev. Ét. Juives," 7:42). At the same time Simson ben Abraham of Sens took the part of the son-in-law of Simson of Troyes, who, being afraid of the influence of the opposite party, also objected to being tried before the rabbinical court of that town (Gross, c.).