According to 1 Chronicles 2:9, 18-19, 42, 50, the son of Hezron the son of Pharez the son of Judah, and the father of Hur, and consequently grandfather of Caleb the spy
Son of Jephunneh, one of the twelve spies sent by Moses to Canaan (Numbers 13:6). He and Oshea or Joshua the son of Nun were the only two of the whole number who encouraged the people to enter in boldly to the land and take possession of it. Forty-five years afterwards Caleb came to Joshua and claimed possession of the land of the Anakim, Kirjath-arba or Hebron, and the neighboring hill country (Joshua 14). This was immediately granted to him, and the following chapter relates how he took possession of Hebron, driving out the three sons of Anak; how he offered Achsah his daughter in marriage to whoever would take Kirjath-sepher, i.e. Debir; and how when Othniel, his younger brother, had performed the feat, he not only gave him his daughter to wife, but with her the upper and nether springs of water which she asked for. It is probable that Caleb was a foreigner by birth—a proselyte incorporated into the tribe of Judah.