Cross reference
1 Chronicles 2:48
48 Maacah, Caleb's concubine, bore Sheber and Tirhanah.
Genesis 25:5-6
5 Abraham gave all that he had to Isaac,
6 but to the sons of the concubines who Abraham had, Abraham gave gifts. He sent them away from Isaac his son, while he yet lived, eastward, to the east country.
1 Chronicles 2:46
46 Ephah, Caleb's concubine, bore Haran, and Moza, and Gazez; and Haran became the father of Gazez.