Midianites: Governed by Kings
Source: TTT
Numbers 31:8
Among the slain were Evi, Rekem, Zur, Hur, and Reba—the five kings of Midian. They also killed Balaam son of Beor with the sword.
Judges 8:5
So Gideon said to the men of Succoth, “Please give my troops some bread, for they are exhausted, and I am still pursuing Zebah and Zalmunna, the kings of Midian.”