Keturah
The wife Abraham took after Sarah's death, who bore him six sons — Zimran, Jokshan, Medan, Midian, Ishbak and Shuah — the ancestors of Arabian peoples including the Midianites. Abraham gave everything he had to Isaac, but gave gifts to the sons of his concubines and sent them away eastward while he was still living, so that the inheritance was not divided.
What we know — and how we know it
Where in scripture
Genesis1 ChroniclesAbraham took another wife, and her name was Keturah.
Genesis 25:1 — Bears Abraham more sons
The sons of Midian were: Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the children of Keturah.
Genesis 25:4
The sons of Keturah, Abraham’s concubine: she bore Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The sons of Jokshan: Sheba and Dedan.
1 Chronicles 1:32
The sons of Midian: Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the sons of Keturah.
1 Chronicles 1:33
Scripture quotations are from the World English Bible, a public-domain translation.