Isaac was the promised son born through Sarah, proving Jehovah’s covenant faithfulness and defining Abraham’s true covenant line.
How Many Sons Did Abraham Actually Have According to Scripture?
Abraham had eight sons—two before Sarah’s death and six by Keturah—with Isaac alone serving as the covenant heir.
The Sons of Ishmael (Genesis 25:12–18)
The Ishmaelites, descended from Abraham and Hagar, became fierce nomadic tribes from Egypt to Mesopotamia, yet vanished from history after David’s time.

