Abraham had two sons, Isaac and Ishmael.
The sons of Ishmael became the heads of twelve tribes: Nebaioth (from the name of Ishmael's oldest son), Kedar, Adbeel, Mibsam,
Mishma, Dumah, Massa, Hadad, Tema,
Jetur, Naphish, and Kedemah.
Abraham had a concubine named Keturah, who bore him six sons: Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. Jokshan had two sons: Sheba and Dedan.
Midian had five sons: Ephah, Epher, Hanoch, Abida, and Eldaah.
Abraham's son Isaac had two sons, Esau and Jacob.
Esau's sons were Eliphaz, Reuel, Jeush, Jalam, and Korah.
Eliphaz became the ancestor of the following tribes: Teman, Omar, Zephi, Gatam, Kenaz, Timna, and Amalek.
And Reuel became the ancestor of the tribes of Nahath, Zerah, Shammah, and Mizzah.
The original inhabitants of Edom were descended from the following sons of Seir: Lotan, who was the ancestor of the clans of Hori and Homam. (Lotan had a sister named Timna.) Shobal, who was the ancestor of the clans of Alvan, Manahath, Ebal, Shephi, and Onam. Zibeon, who had two sons, Aiah and Anah. Anah was the father of Dishon, and Dishon was the ancestor of the clans of Hamran, Eshban, Ithran, and Cheran. Ezer, who was the ancestor of the clans of Bilhan, Zaavan, and Jaakan. Dishan, who was the ancestor of the clans of Uz and Aran.