Patronymically from Qhath; a Kohathite (collectively) or descendants of Kehath -- Kohathites.
see HEBREW Qhath
H6956. Qehathi
קְהָתִי adjective, of a people of foregoing, with article ׳הַקּ as substantive collective: מִשְׁפַחַתּ הַקּ ׳(ו־ֺת) Numbers 26:57 8t.; הַקּ ׳בְּנֵי 4:34; 1 Chronicles 6:18; 2 Chronicles 29:12; plural הַקְּהָתּים Numbers 10:21 and הַקּ ׳בְּנֵי2 Chronicles 20:19; 34:12. — Van d. H. has (ם)הַקֳּהָתִי Numbers 3:27; 10:21 6t.