Sidi ibn Ibrahim al-Taras

Sidi ibn Ibrahim ibn Hasdai al-Tarās (Hebrew: סידי בן אברהם בן חסדאי אלתראס) (Arabic: سيدي بن ابراهيم بن حدادي التاراس) also called Sidi ibn al-Tarās was an 11th-century Sephardic Karaite scholar.

Born to the al-Taras family in Castile, Spain around 1065. Several sources written by Joseph ben Tzaddik and Abraham ibn Daud state that in his early years, al-Taras became a disciple of the Karaite scholar Jeshua ben Judah. He eventually returned to Spain settling around Andalusia, where he attempted to gain Karaite followers amongst the Rabbanites. This made al-Taras a highly controversial figure leading to the expulsion of the Karaites in Castile by Alfonso VI, who was pressured by local Jewish communities to do so.