'Uthman ibn 'Amir ibn 'Amr ibn Ka'b, also known as Abu Quhafa (542–635 CE) (Arabic: أبو قحافة), was the father of Abu Bakr Siddiq. Salma was Abu Bakr's mother, She was also known as Umm-ul-Khair.
He was 90 years old when he accepted Islam in 8 A.H.