Keturah: Wife (Concubine) of Abraham
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Genesis 25:1–4
Now Abraham had taken another wife, named Keturah, / and she bore him Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. / Jokshan was the father of Sheba and Dedan. And the sons of Dedan were the Asshurites, the Letushites, and the Leummites.
1 Chronicles 1:32
The sons born to Keturah, Abraham’s concubine: Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The sons of Jokshan: Sheba and Dedan.