The sons of Shimon: Amnon, Rinnah, Ben-hanan, and Tilon. The sons of Ishi: Zoheth and Ben-zoheth.
We may observe in these verses, 1. That here is a whole family of craftsmen, handicraft tradesmen, that applied themselves to all sorts of manufactures, in which they were ingenious and industrious above their neighbours, Ch1 4:14. There was a valley where they lived which was, from them, called the valley of craftsmen. Those that are craftsmen are not therefore to be looked upon as mean men.
Commenting on 1 Chronicles 4:11-23
And the sons of Shimon,.... Perhaps another son of Mered by his last wife, or the same with Shammai, Ch1 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.
1Ch 4:20 Of Shimon and his four sons, also, nothing is known. בּן־חנן is one name. Ishi is often met with, e.g., 1Ch 4:42 and 1Ch 2:31, but nowhere in connection with Zoheth (not further noticed). The names of the sons are wanting after בּן־זוחת.