The sons of Caleb the brother of Jerahmeel: Mesha his firstborn, who was the father of Ziph, and Mareshah his second son, who was the father of Hebron.
Now the sons of Caleb the brother of Jerahmeel [were], Mesha his firstborn, which was the father of Ziph; and the sons of Mareshah the father of Hebron. (l) That is, the chief governor or prince of the Ziphims, because the prince should have a fatherly care and affection for his people.
The text about Caleb appears tangled in our version: he is called father of Hur in one place and son of Hur in another. The latter passage has been copied wrong and should read 'Hur the son of Caleb.' Azubah was his wife; Jerioth was a secondary wife, mother of those children named.
AI summary
Commenting on 1 Chronicles 2:18-55
the sons of Caleb--(compare Ch1 2:18, Ch1 2:25). The sons here noticed were the fruit of his union with a third wife.