John Gill Commentary 1 Chronicles 2:32

"And the sons of Jada the brother of Shammai: Jether, and Jonathan; and Jether died without children." — 1 Chronicles 2:32 (ASV)

And the sons of Jada the brother of Shammai
(1 Chronicles 2:28) ,

Jether and Jonathan: and Jether died without children ;
the posterity of Jonathan are given the next verse.