4 occurrences in 4 dictionaries
Reference: Koz
Easton
thorn. (1.) A descendant of Judah. 1Ch 4:8, "Coz;" R.V., "Hakkoz."
(2.) A priest, the head of the seventh division of the priests (Ezr 2:61; Ne 3:4,21; 7:63). In 1Ch 24:10 the word has the article prefixed, and it is taken as a part of the word "Hakkoz."
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Morish
1. Priest whose descendants were unable to prove their genealogy. Ezr 2:61; Ne 7:63.
2. Ancestor of some who repaired the wall of Jerusalem. Ne 3:4,21. See HAKKOZ.