And the sons of Helah were, Zereth, and Jezoar, and Ethnan. And Ethnan - After this word we should, with the Targum, read Coz, whose posterity is mentioned in the next verse. Coz was probably the same as Kenaz.
Related Commentaries of 1 Chronicles 4:7
1 Chronicles 4:7
7 And the sons of Helah were, Zereth, and Jezoar, and Ethnan.