Original: Am r al-Mu ` min n ( Arabic ; latinized as Miramolinus , hence Italian Miramolino and Spanish Miramamolín ) usually translated Commander of the Faithful or Leader of the Faithful , is the Arabic style of Caliphs and other independent sovereign Muslim rulers that claim legitimacy from a community of Muslims .
Simplified: Shia view that Ali , the prophet of Islams son-in-law and the only person to father the prophets only continuing lineage , was given the title during Muhammads era .