The wife of Moses and mother of his sons, Gershom and Eliezer (Exodus 2:21). Zipporah is listed as the daughter of Reuel (Exodus 2:18). But, Reuel was probably the father of Hobab, who was the father of Zipporah (Numbers 10:29; called Jethro in Exodus 3:1; 4:18). So, Reuel would have been Zipporah's grandfather.
Zipporah circumcised Gershom to prevent Moses’ death before his return to Egypt (Exodus 4:25). Apparently at that point Zipporah and the children left Moses and went back to live with her father, returning later during the time Israel wandered in the wilderness (Exodus 18:2).