“¶ And Caleb the sonne of Hezron, begate children of Azubah his wife, and of Ierioth: her sonnes are these: Iesher, Shobab, and Ardon.”
1611 King James Version (KJV)
2:18 Her sons - The sons of Azubah, who is by way of distinctioncalled his wife, when Jerioth probably was only his concubine, and,it may seem, barren: therefore upon Azubah's death he married anotherwife. And those other sons of this Caleb mentioned, ver.#42|, arehis sons by some other wife distinct from all these.