An Egyptian physician, astrologer and astronomer, born in Jiza (ca. 998-ca. 1061). He was a commentator on Greek medicine, and in particular on Galen and Hippocrates. He is also known for his observation of the Supernova that appeared in the sky in 1006, which he mentioned in his commentary on Ptolemy's Tetrabiblos.
Among his works: De revolutionibus nativitatum (The Revolutions of Nativities), edited by Luca Gaurico, printed in Venice (1524); Tractatus de cometarum significationibus per xii signa zodiaci (Treatise on the Significations of Comets in the twelve Signs of the Zodiac), printed in Nürnberg (1563).