Hakkoz

The thorn, the head of one of the courses of the priests (1 Chronicles 24:10).

Source: Easton's Bible Dictionary
Hakkoz

(thorn ), a priest, the chief of the seventh course in the service of the sanctuary, as appointed by David. (1 Chronicles 24:10) In (Ezra 2:61) and Nehe 3:4,21 The name occurs again as Koz in the Authorized Version.

Source: Smith's Bible Dictionary