The name of the Israelite who was slain with the Midianite woman was Zimri son of Salu, the leader of a Simeonite family.
14. Now the name of the Israelite. Even as the memory of the just is blessed, so also it was equitable that the author of this foul sin should be condemned to perpetual infamy. It appears, however, from the fact of a part of the disgrace being thrown upon the whole tribe, how greatly displeasing to God was this gross enormity.
Here is a remarkable contest between wickedness and righteousness, which shall be most bold and resolute; and righteousness carries the day, as no doubt it will at last. I. Never was vice more daring than it was in Zimri, a prince of a chief house in the tribe of Simeon.
Commenting on Numbers 25:6-15
And the name of the Midianitish woman that was slain was Cozbi, the daughter of Zur,.... One of the five kings of Midian, Num 31:8 and so the Samaritan Chronicle says (k), it was the daughter of a king that came to a prince of the tribe of Simeon, and enticed him to eat of her food, and worship her idols.