Abraham ibn Daud

Toledo historian and philosopher. His Sefer ha-Kabbalah traced the chain of rabbinic tradition from Moses to his own day to answer the Karaites, and remains a basic source for the history of Spanish Jewry. His Ha-Emunah ha-Ramah was the first systematic Jewish work of Aristotelian philosophy, a generation before Maimonides. Tradition holds that he died a martyr in Toledo.