Jether the Ishmaelite By birth or habitation, but by profession an Israelite, 2 Samuel 17:25. And her sons The sons of Azubah, who is by way of distinction called his wife, when Jerioth probably was only his concubine, and, it may seem, barren: therefore, upon Azubah's death he married another wife, 1 Chronicles 2:19. And those other sons of this Caleb, mentioned 1 Chronicles 2:42, are his sons by some other wife distinct from all these.
Related Commentaries of 1 Chronicles 2:17
1 Chronicles 2:17-18
17 And Abigail bare Amasa: and the father of Amasa was Jetherg the Ishmeelite.
18 And Caleb the son of Hezron begat children of Azubah his wife, and of Jerioth: her sons are these; Jesher, and Shobab, and Ardon.