First Caliph - Abu Bakr  

Second Caliph - Umar Ibn Khattab

Third Caliph - Uthman ibn affan

Fourth Caliph- Ali ibn Talib

Fifth Caliph - Hasan Ibn Ali

Sixth Caliph -'Umar ibn Abdul-Aziz

Seventh?

Eigth?

Ninth Caliph ?

Tenth Caliph ?

 Eleventh?

Twelfth Caliph Mahdi