John Gill Commentary 1 Chronicles 12:6

"Elkanah, and Isshiah, and Azarel, and Joezer, and Jashobeam, the Korahites," — 1 Chronicles 12:6 (ASV)

Elkanah, and Jesiah, and Azareel, and Joezer, and Jashobeam,
the Korhites .
Not Korahites, descendants of Levi, (1 Chronicles 9:19) , but the posterity of Korah a Benjaminite.