The Prophet Ibrahim (may Allah’s peace and blessings descend upon our Prophet Muhammad and upon him and both their families) was the son of Terah. This is mentioned in Genesis 11:26-27, and Genesis 11:31.
Ibn Abbas- radi Allahu anh– are agreed that the name of Ibrahim’s father is Tareh, and that the People of the Book, the Jews and the Christians.
Ibrahim (as) was the son of Tarakh. When Tarakh was 75 years of age, Ibrahim (as) was born to him.
Sunni reference: al-Bidaya wan Nahaya, by Ibn Katheer, v 1 p 139
in his Commentary of the Qur’an he states that ‘Azar’ was NOT the father of Ibrahim (as).
Sunni references:
- History of al-Tabari, v 1 p 119
- Tafsir Tabari, by Ibn Jarir al-Tabari, v 7 p 158