Ahmad Ibn Yusuf ibn Ibrahim ibn al-Daya al Misri, (the latter word means the Egyptian). He flourished in Egypt in the second half of the 9th century and died about 912. He set up some of the earliest foundations of modern mathematics and in medieval Europe, he was known as Ametus filius Joseph.
Ahmed Ibn Yusuf
Ahmed Ibn Yūsuf Ibn Ibrāhim al-Misrī Ibn ad-Dāya
أحمد بن يوسف بن إبراهيم المصري بن الداية
Ametus filius Iosephi
Date of death: