Segan Leṿiyah, Yitsḥaḳ ben El‘azar, -approximately 1080
Rabenu ha-Kadosh, -approximately 1080
Segan Leviyyah, -approximately 1080
Isaac ben Eliezer, -approximately 1080
Isaac ben Eleazar ben Isaac, . approximately 1080
Yitsḥaḳ ben El‘azar, Segan Leṿiyah, d. approximately 1080
Notes:
Reshuyot le-ḥatan, 1936 p. 7 (Rabenu Yitsḥaḳ b.R. El‘azar, Segan Leṿiyah, of Loter and Germany, teacher of Rashi, also known as "Rabenu ha-kadosh" at Worms yeshivah, d. ca. 1080)
Encycl. Judaica, 1972 index (Segan Leviyyah; Isaac ben Eliezer; Isaac ben Eleazar ben Isaac)