Abraham is the father of Isaac with his wife Sarah. He also has Ishmael with Hagar, Sarah's handmaid, and he has other children with Keturah, whom he marries after Sarah's death. He is the grandfather of Jacob and Esau. Abraham is believed to be the founding patriarch of the Israelites, Ishmaelites and Edomites. Abraham was the third son of Terah and the grandson of Nahor. Abraham's older brothers were named Nahor and Haran.