Abraham's sons: Isaac and Ishmael.
References for 1 Chronicles 1:28
These are their family records: Nebaioth, Ishmael's firstborn, Kedar, Adbeel, Mibsam,
Mishma, Dumah, Massa, Hadad, Tema,
Jetur, Naphish, and Kedemah. These were Ishmael's sons.
References for 1 Chronicles 1:31
The sons born to Keturah, Abraham's concubine: Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. Jokshan's sons: Sheba and Dedan.
Midian's sons: Ephah, Epher, Hanoch, Abida, and Eldaah. All of these were Keturah's sons.
References for 1 Chronicles 1:33
Abraham fathered Isaac. Isaac's sons: Esau and Israel.
References for 1 Chronicles 1:34
Esau's sons: Eliphaz, Reuel, Jeush, Jalam, and Korah.
Eliphaz's sons: Teman, Omar, Zephi, Gatam, and Kenaz; and by Timna, Amalek.
References for 1 Chronicles 1:36
Reuel's sons: Nahath, Zerah, Shammah, and Mizzah.
References for 1 Chronicles 1:37