Parshat Yitro starts off with the following words (Shmot 18:1):

Yitro, the Kohen of Midian, Moshe’s father-in-law, heard all that God had done for Moshe and for His people Israel, when God brought Israel out from Egypt.

Mechilta D’Rabbi Yishmael, Amalek 3:4 comments:

Yitro had seven names: Yeter, Yitro, Hovav, Reuel, Hever, Putiel, Keni. Yeter — he added (yiter) a section in the Torah; Yitro — he was “abundant” (yiter) in good deeds. Hovav — he was beloved (hovev) by the Lord. Reuel — he was a “friend” (rea) to the Lord. Hever — he was a “companion” (haver) to the Lord. Putiel — he “weaned himself” (niftar) from idolatry. Keni — he was zealous (kinei) for Heaven and he acquired (kanah) Torah.

In Bamidbar 10:29-32 we read:

Moshe said to Hovav the son of Reuel the Midianite, Moshe’s father-in-law: “We are........

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