John Gill Commentary 1 Chronicles 4:20

"And the sons of Shimon: Amnon, and Rinnah, Ben-hanan, and Tilon. And the sons of Ishi: Zoheth, and Ben-zoheth." — 1 Chronicles 4:20 (ASV)

And the sons of Shimon
Perhaps another son of Mered by his last wife, or the same with Shammai, (1 Chronicles 4:17) were

Amnon, and Rinnah, Benhanan, and Tilon ;
nowhere else mentioned:

and the sons of Ishi :
who it may be was the brother of Shimon or Tilon: were

Zoheth, and Benzoheth ;
of whom we know no more than their names.