“After the death of Hezron, Caleb went in to Abijah, the wife of Hezron his father, and she bore him Ashhur, the father of Tekoa.”
Caleb seems to have a dominant role in this genealogy. He had sex with his father’s wife after his father Hezron had died. They had a son named Ashhur, whose name only appears here in 1 Chronicles. However, Ashhur’s son Tekoa is more famous as a place rather than a person. Tekoa is where Joab found a wise woman in 2 Samuel, chapter 14, to go to King David. Otherwise we know very little about Tekoa.