Zebah: one of the two Midianite kings Gideon chased down and put to death
Zebah was a king of Midian in Gideon's day, and the story never mentions him alone. He is always "Zebah and Zalmunna" (צַלְמֻנָּע), the pair who got away when Gideon's three hundred men broke the Midianite camp. Gideon crosses the Jordan after them, asks the men of Succoth for bread and is mocked for it, since they do not believe he will ever lay hands on the two kings. He catches them anyway at Karkor with what was left of their army, and he comes back through Succoth with them to prove the point.
The end of the chase is a family matter. Gideon asks the two kings about the men they killed at Tabor and learns they were his own brothers. He tells his oldest son to kill them, and the boy is too frightened to draw his sword, so the kings themselves tell Gideon to do it, and he does, taking the crescent ornaments off their camels' necks afterward.
His name is where the Hebrew does something English cannot follow. It is spelled exactly like the everyday Hebrew word for a sacrifice (זֶבַח), the animal killed so that a household could eat it in God's presence. English Bibles print the sound of it, "Zebah," and the ordinary word behind it vanishes. Hebrew readers heard it, and this king is not the only case: the two Midianite officers hunted down earlier in the same campaign are named "Raven" and "Wolf" (עֹרֵב, זְאֵב). The account itself makes no comment on any of the three names. Psalm 83 later prays that a new set of enemies will end up like all four of these men.