Judah ben Bava

R. Yehudah ben Baba (also Judah ben Baba, nickname: Hasid, " the Pious ", which occurs in the Talmud Hasid without attribution is either meant Yehudah ben Baba or Jehuda ben Ilai ) was a respected than Frommer impeccable Jewish scholar of antiquity. He lived and worked in the second century AD and belonged to the second generation of the Tannaim.

He was a student of Samuel hakatan and disputed, especially with Rabbi Akiva.

He gave a number of pupils of Akiba soon after his death the ordination, although Hadrian had it set to the death penalty.

He is said, when the Roman pursuers approached them, have given the ordained opportunity to escape while he persevered and have even suffered martyrdom ( Babyl. Sanhedrin 14a).

Among his Halachot is considered as the most important one that allows a Aguna enter into a new marriage, even if only a witness confirmed the man's death.