Abu Bakr
Abu Bakr (Arabic: أبو بكر, romanised: ʾAbū Bakr), born Abdullah ibn Abi Quhafa (Arabic: عَبْدُ اللهِ بْنُ أَبِي قُحَافَةَ, romanised: ʿAbd Allāh ibn ʾAbī Quḥāfa; c. 573 – 23 August 634), was a senior companion, the closest friend, and father-in-law of Muhammad, the Islamic prophet. He served as the first caliph of the Rashidun Caliphate, ruling from 632 until his death in 634.