Meaning: his excellence, or gain
He was also called Hobab, which was probably his personal name, while Jethro was an official name.
While the Israelites were encamped at Sinai, and soon after their victory over Amalek, Jethro came to meet Moses, bringing with him Moses’s wife Zipporah (daughter of Reuel) and her two sons. They met at the “mount of God,” and “Moses told him all that the Lord had done unto Pharaoh” (Exodus 18:8).
On the following day Jethro, observing the multiplicity of the duties devolving on Moses, advised him to appoint subordinate judges, rulers of thousands, of hundreds, of fifties, and of tens, to decide smaller matters, leaving only the weightier matters to be referred to Moses, to be laid before the Lord. This advice Moses adopted (Exodus 18).