Patronymic from Qorach; a Korchite (collectively) or descendants of Korach -- Korahite, Korathite, sons of Kore, Korhite.
see HEBREW Qorach
H7145. Qorchi
קָרְחִי adjective, of a people of קֹרַח
2; always with article; 1 Chronicles 9:31; as substantive collective Exodus 6:24; Numbers 26:58; plural הַקָּרְחִים 1 Chronicles 9:19; 12:7 (van d. H. v.12:6). 26:1; בְּנֵי הַקָּרְחִי 26:19; הַקָּרְחִים בְּנֵי2 Chronicles 20:19.
II. קרח (√ of following; meaning unknown).