Jethro in the Bible

Exodus 2:15-22 Now when Pharaoh heard this thing, he sought to slay Moses. But Moses fled from the face of Pharaoh, and dwelt in the land of Midian: and he sat down by a well. 16 Now the priest of Midian had seven daughters: and they came and drew water, and filled the troughs to water their father's flock. 17 And the shepherds came and drove them away: but Moses stood up and helped them, and watered their flock. 18 And when they came to Reuel their father, he said, How is it that ye are come so soon to day? ...
Exodus 3:1 Now Moses kept the flock of Jethro his father in law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb.
Exodus 4:18 And Moses went and returned to Jethro his father in law, and said unto him, Let me go, I pray thee, and return unto my brethren which are in Egypt, and see whether they be yet alive. And Jethro said to Moses, Go in peace.
Numbers 10:29 And Moses said unto Hobab, the son of Raguel the Midianite, Moses' father in law, We are journeying unto the place of which the LORD said, I will give it you: come thou with us, and we will do thee good: for the LORD hath spoken good concerning Israel.