Muhammad ibn Mūsā al-Khwārizmī, a 9th century mathematician

al-Khwarizmi (crater), a crater on the far-side of the moon named after Muhammad ibn Mūsā al-Khwārizmī

Muhammad ibn Ahmad al-Khwārizmī, the 10th century encyclopedist who wrote Mafatih al-'Ulum ("Key to the Sciences")