Albert Barnes Commentary Exodus 17:10

"So Joshua did as Moses had said to him, and fought with Amalek: and Moses, Aaron, and Hur went up to the top of the hill." — Exodus 17:10 (ASV)

Hur - Again mentioned with Aaron, in Exodus 24:14. He was grandfather of Bezaleel, the great sculptor and artificer of the tabernacle (Exodus 31:2–5), and belonged to the tribe of Judah. (See 1 Chronicles 2:18–20.)