Adam Clarke on Exodus 17:10

Moses, Aaron, and Hur went up - It is likely that the Hur mentioned here is the same with that Hur mentioned 1Chr 2:19, who appears from the chronology in that chapter to have been the son of Caleb, the son of Ezron, the son of Pharez, the son of Judah. The rabbins and Josephus say he was the brother-in-law of Moses, having married his sister Miriam. He was a person in whom Moses put much confidence; for he left him conjoint governor of the people with Aaron, when he went to confer with God on the mount, Exo 24:14. His grandson Bezaleel was the chief director in the work of the tabernacle; see Exo 31:2-5.