Muhammad ibn Ahmad al-Khwarizmi

Muḥammad ibn al-ʿAbbās Abū Bakr al-Khwārazmī, better simply known as Abu Bakr al-Khwarazmi was a 10th century Persian poet born in Khwarazm, who throughout his long career served in the court of the Hamdanids, Samanids, Saffarids and Buyids. He is best known as the author of the early encyclopedia Mafātīḥ al-ʿulūm in the Arabic language.