al-Mansur Abu Bakr
Al-Mansur Abu Bakr (c. 1321–1341) was the Mamluk sultan who briefly ruled Egypt after his father, al-Nasir Muhammad, died in 1341. Born to the concubine Narjis, he trained from boyhood at the desert fortress of al-Karak and was named heir ahead of his brothers.
His reign lasted about two months: in 1341 the senior emir Qawsun deposed and arrested him, and two months later had him executed in Upper Egypt.