1 Chronicles 7:33 lists the sons of Japhlet: Pasach, Bimhal, and Ashvath, stating that these are the children of Japhlet. This verse is part of a genealogy, simply recording the descendants in a family line.
The book of 1 Chronicles was written to document the history and lineage of the tribes of Israel, often for the benefit of later generations. In this verse, the chronicler is naming the sons of Japhlet as part of the genealogy of the tribe of Asher. The focus is on preserving the names and family connections, which were important for identity and inheritance among the Israelites.