1 Chronicles 4:1

“The sons of Judah: Pharez, etc.] The posterity of Judah in the line of Pharez, for he only is mentioned: Hezron, and Carmi, and Hur, and Shobal. Hezron was the son of Pharez, and Carmi is supposed to be Chelubai, or Caleb, the son of Hezron; and Hur the son of Caleb; and Shobal was the son of the second Caleb the son of Hur; (see <130205>1 Chronicles 2:5,9,19,50).”

“POSTERITY OF JUDAH BY CALEB THE SON OF HUR. (Ch1 4:1-8) the sons of Judah--that is, "the descendants," for with the exception of Pharez, none of those here mentioned were his immediate sons. Indeed, the others are mentioned solely to introduce the name of Shobal, whose genealogy the historian intended to trace (Ch1 2:52).”

“The sons - The posterity: for only Pharez was his immediate son. But they are all mentioned here only to shew Shobal's descent from Judah. 1 Chronicles 4:9”

“4:1-7 The genealogy of Judah continues, with links back to 2:1-55. The connection to Hur, the ancestor of Bethlehem, is provided immediately (4:1-4; see 2:19-20, 51-55).”

“am 2283, etc. bc 1721, etc Pharez: Ch1 2:5; Gen 38:29, Gen 46:12; Num 26:20, Num 26:21; Rut 4:18; Mat 1:3; Luk 3:33, Phares, Esrom Carmi: Ch1 2:9, Chelubai, Ch1 2:18, Caleb 1 Chronicles 4:2”

“Ch1 4:1 is evidently intended to be a superscription to the genealogical fragments which follow. Five names are mentioned as sons of Judah, of whom only Pharez was his son ( Ch1 2:4); the others are grandchildren or still more distant descendants. Nothing is said as to the genealogical relationship in which they stood to each other; that is supposed to be already known from the genealogies in 1 Chron 2. Hezron is the son of Pharez, and consequently grandson of Judah, Ch1 2:8. Carmi, a descendant of Zerah, the brother of Pharez, see on Ch1 2:6-7. Hur is a son of Caleb, the son of Hezron, by Ephratah (see on Ch1 2:19 and Ch1 2:50); and Shobal is the son of Hur, who has just been mentioned (…”