Exodus 18:4 - Ellicott's Commentary On The Whole Bible

Eliezer. — Eliezer is supposed to have been the boy whom Zipporah circumcised in the wilderness (Exodus 4:25). He grew to manhood, and had a son, Rehabiah (1 Chronicles 23:17), whose descendants were in the time of David very numerous (1 Chronicles 23:17; and comp. 1 Chronicles 26:25-26). It is uncertain whether Moses gave him his name before parting from him, in allusion to his escape from the Pharaoh who “sought to slay him” (Exodus 2:15), or first named him on occasion of receiving him back, in allusion to his recent escape from the host which had been destroyed in the Red Sea.