Genesis 25:1-4 NIV

[1] Abraham had taken another wife, whose name was Keturah. [2] She bore him Zimran, Jokshan, Medan, Midian, Ishbak and Shuah. [3] Jokshan was the father of Sheba and Dedan; the descendants of Dedan were the Ashurites, the Letushites and the Leummites. [4] The sons of Midian were Ephah, Epher, Hanok, Abida and Eldaah. All these were descendants of Keturah.