Genesis 25:1-2, 4
Genesis 25:1-2 AMP
Abraham took another wife, whose name was Keturah. She gave birth to Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah.
Genesis 25:4 AMP
The sons of Midian were Ephah, Epher, Hanoch, Abida, and Eldaah. All these were the sons of Keturah.