en_tn/exo/18/03.md

and her two sons

This is the ending of the sentence that begins with the words "Jethro ... took Zipporah" in verse 2. Possible meanings are 1) Jethro took Zipporah and her two sons to Moses, or 2) Jethro had earlier welcomed back Zipporah and her two sons.

Gershom

This is a son of Moses and Zipporah, whose name means "foreigner." (See: rc://en/ta/man/translate/translate-names)