1 Chronicles 2:18-19

18 aCaleb the son of Hezron fathered children by his wife Azubah, and by Jerioth; and these were her sons: Jesher, Shobab, and Ardon. 19When Azubah died, bCaleb married cEphrath, who bore him dHur.

1 Chronicles 2:48

48Maacah, Caleb’s concubine, bore Sheber and Tirhanah.
Copyright information for ESV