Karkasani (Qirqisani), Abu Yusuf Yakub (Iacob; Kirkisani, Jacob)

(fl. 10th cent)

   Babylonian Karaite scholar. He came from Karkasan near Baghdad. He was the most important proponent of Karaism of his age. His Book of Lights and Watch-Towers is a systematic code of Karaite law. In Book of Gardens and Parks he commented on the non-legal parts of the Torah.