re.va is used as the proper name of a Midianite king listed with four other rulers.

The attested form functions as a proper name for one of five Midianite kings: he is listed among those killed in Numbers 31:8 and among Midianite princes associated with Sihon in Joshua 13:21.

1. A named Midianite ruler · dominant

   The form is tagged as a proper noun in both verses. In Numbers 31:8 the APB renders the list of Midianite kings killed, including “Reba”; in Joshua 13:21 it renders him among the princes of Midian described as vassals of Sihon.

   Numbers 31:8Joshua 13:21

In the Anselm Project Bible: The APB presents the name as “Reba” in both lists: among the Midianite kings killed in Numbers 31:8 and among Midianite princes in Joshua 13:21. The verse is read as a whole, but both clauses identify the same named figure.