The sons of Izhar were Korah, Nepheg, and Zichri.
These were Kohath’s descendants: Kohath’s son was Amminadab. Amminadab’s son was Korah. Korah’s son was Assir.
and next to him Amasiah, Zichri’s son, who volunteered to serve the Lord (with 200,000 fighting men).
The sons of Korah were Assir, Elkanah, and Abiasaph. These were the families descended from Korah.
Korah (son of Izhar), Dathan and Abiram (sons of Eliab), and On (son of Peleth) dared to challenge Moses. (Korah was a descendant of Kohath and Levi. Dathan, Abiram, and On were descendants of Reuben.)
and the earth opened up to swallow them, their families, the followers of Korah, and all their property.