After listing the sons of Ishmael, the sons of Abraham’s concubine Keturah, and the sons of Esau, the account focuses on the line of descent of the 12 sons of Israel. —1 Chronicles 2:1.
The name appears in a list of Caleb’s descendants through his concubine Maacah, her son Sheva being called “the father of Machbenah and the father of Gibea.”
Keturah is specifically referred to as “Abraham’s concubine” at 1 Chronicles 1:32, and quite apparently she and Hagar are meant at Genesis 25:6, where reference is made to the sons of Abraham’s “concubines.”
(Ge 12:10-20) Not long after God’s statement about the 400 years of affliction, when Abraham was 86 years old (in the year 1932 B.C.E.), his Egyptian slave girl and concubine bore him a son, Ishmael.
(2Ch 11:18) As Jerimoth is not included in the listings of David’s sons by his named wives, he might have been a son by a concubine or by an unnamed wife.