'Mistress' in the Bible

The descendants born to Keturah, Abraham's mistress, were Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The descendants of Jokshan were Sheba and Dedan.

Caleb's mistress Ephah also bore Haran, Moza, and Gazez.

Caleb's mistress Maacah bore Sheber, Tirhanah,

Manasseh's descendants included Asriel, whom his Aramean mistress bore, along with Machir, who fathered Gilead.