Charles Ellicott Commentary 1 Chronicles 2:24

"And after that Hezron was dead in Caleb-ephrathah, then Abijah Hezron`s wife bare him Ashhur the father of Tekoa." — 1 Chronicles 2:24 (ASV)

And after that Hezron was dead ... —Or, And after the death of Hezron in Caleb-ephratah—and the wife of Hezron was Abiah—and she bore him Ashur ... The text is evidently corrupt. The best suggestion is based on the reading of the Septuagint: καὶ μετὰ τὸ; And after Hezron’s death Caleb went to Ephrath. Some very slight changes in the Hebrew, affecting only three letters of the entire sentence, will give the sense, And after Hezron’s death Caleb went in to Ephrath, the wife of his father Hezron (1 Chronicles 2:19); and she bore him Ash-hur, father (founder, or chief) of Tekoa. .

Ashur (Hebrew, Ash-hur) means “man of Hur”—that is, the chief of the clan of the Hurites, settled at Ephrath or Bethlehem (1 Chronicles 2:19). Compare to Ashbel “man of Bel.” (Ash is the older form of Ish “man”; as appears from the Phoenician inscriptions.)

That “Caleb” in this verse means the house of Caleb is evident if we consider that the genealogy makes him great-grandson of Judah, whereas the individual Caleb son of Jephunneh took part in the conquest of Canaan, more than four centuries after Judah went down to Egypt.

III.—The Jerahmeelites (1 Chronicles 2:25–41). Compare to 1 Samuel 27:10, the south (land) of the Jerahmeelites, in the territory of Judah.