John Gill Commentary 1 Chronicles 6:20

"Of Gershom: Libni his son, Jahath his son, Zimmah his son," — 1 Chronicles 6:20 (ASV)

Ver. 20,21. Of Gershon, Libni his son

Whose genealogy runs thus, Jahath, called Jehiel, (1 Chronicles 23:8) . Zimmah, between whom was Shimei, (1 Chronicles 6:42) . Joah, the same with Ethan, (1 Chronicles 6:42) . Iddo, called Adaiah, (1 Chronicles 6:41) . Zerah, Jeaterai, whose name was also Ethni, (1 Chronicles 6:41) , the posterity of Shimei, the brother of Libni, are omitted.