BAḤTAWI, ABU YA'AḲUB JOSEPH, THE BABYLONIAN:
Karaite scholar; flourished in the ninth century. He was called "the teacher of the diaspora," and esteemed for his brilliant intellect. None of his works has survived; but many of them are known by quotations made by Karaite writers. Solomon b. Yeruḥam, in his "Muḳaddimah" (Introduction to the Decalogue), mentions Baḥtawi's "Sefer ha-Miẓwot" (Book of Precepts); and Jephet ben Ali in his commentary upon the Book of Daniel refers to Baḥtawi's Biblical commentaries. Baḥtawi was known chiefly as "ha-medaḳdeḳ" (the grammarian), and his etymologies are quoted by the Karaite lexicographer David b. Abraham Alfasi. Bacher identifies him with Abu Ya'aḳub Joseph ben Noah, but this is questioned by Poznanzki.
- Pinsker, in Liḳḳuṭe Ḳadmoniyot, p. 110, German p. 61;
- Geiger, in Jüd. Zeitschrift, v. 177;
- Poznanzki, in Jew. Quart. Rev. viii. 698;
- Bacher, in Rev. Et. Juives, xxx. 251.