More info about the name "Abu bakr"
Combination of ABU and BAKR. Abu Bakr was a companion and father-in-law of the Prophet Muhammad and the first caliph of the Muslim world. His name was in fact a kunya (a nickname) formed using Abu; his real name was Abd Allah. Shia Muslims hold a more negative view of Abu Bakr, hence this name is more widely used among Sunnis.