Abd Allah ibn Abi Quhafa (Arabic: عبد الله بن أبي قحافة, romanized: ʿAbd Allāh ibn ʾAbī Quḥāfa; c. 573 – 23 August 634), commonly known by the kunya Abu Bakr (Arabic: أبو بكر, romanized: ʾAbū Bakr), was the first caliph, ruling from 632 until his death in 634. A close companion and father-in-law of Muhammad, Abu Bakr is referred to with the honorific title al-Ṣiddīq (الصِّدِّيق, lit. the Veracious) by Sunni Muslims. Born to Abu Quhafa and Umm al-Khayr of the Banu Taym, Abu Bakr was amongst the earliest converts to Islam and propagated dawah to the Mushrikites.
https://en.wikipedia.org/wiki/Abu_Bakr