Jethro was called a priest of Midian and became the father-in-law of Moses after he gave his daughter, Zipporah, in marriage to Moses. He is introduced in Exodus 2:18. Jethro's daughter, Zipporah, became Moses's wife after Moses had fled Egypt, having killed an Egyptian who was beating a Hebrew slave.
Having fled to Midian, Moses intervened in a water-access dispute between Jethro's seven daughters and the local shepherds. Jethro consequently invited Moses into his home and offered him hospitality. However, Moses remained conscious that he was a stranger in exile, and named his first son, Jethro's grandson, Gershom, which means stranger.