Caleb the son of Hur - Hur was the son, not the father, of Caleb 1 Chronicles 2:19. The text should perhaps be read: “These (the list in 1 Chronicles 2:42-49) were the sons of Caleb. The sons of Hur, the first-born of Ephratah, were Shobal, etc.”
Related Commentaries of 1 Chronicles 2:50
1 Chronicles 2:50
50 These were the sons of Caleb the son of Hur, the firstborn of Ephratah;i Shobal the father of Kirjathjearim,