Umar Ibn Abi Rabi'ah was born in 644.
Ibn Abi Zayd was born in 922.
Ibn Abi Usaibia was born in 1203.
Umar ibn Hafsun was born in 850.
Abu Bakr, Umar ibn al-Khattab, Uthman ibn Affan, and Ali ibn Abi Talib.
Ahmed ibn Abi Mahalli was born in 1559.
Ibn Abi al-Izz was born in 1331.
Aqeel ibn Abi Talib was born in 590.
Ahmad ibn Abi Diyaf was born in 1804.
Al-Qadi Aqib ibn Mahmud ibn Umar was born in 1556.
David ben Solomon ibn Abi Zimra was born in 1479.
Mustafa Ibn Umar El-Kanemi of Borno was born in 1924.
He didn't. The capital of the Islamic Empire remained in Medinah until the caliphate of 'Ali Ibn Abi Talib.