Career
He lived in Algeria, probably at Tlemçen, at the beginning of the sixteenth century. The surname Kalaẓ is derived from the Arabic khallaṣ (= "collector of taxes"). A grandson of his, also named Judah, was rabbi at Tlemçen at the end of the sixteenth century.
Kalaẓ was the author of a valuable work on ethics entitled Sefer ha-Musar (Constantinople, 1536-1537).
He frequently quotes the Zohar and other cabalistic works, which he held in great esteem.
