​’ASHKENAZI, SEBI (1656–1718), known as Ḥakham Ṣebi, for some time rabbi of Amsterdam, was a resolute opponent of the followers of the pseudo-Messiah, Sabbatai Ṣebi (q.v.). He had a chequered career, owing to his independence of character. He visited many lands, including England, where he wielded much influence. His Responsa, are held in high esteem.