Commentators like John Gill and Charles Ellicott note that the sons of Japhlet mentioned here—Pasach, Bimhal, and Ashvath—are not found anywhere else in Scripture. Their inclusion in this genealogy, despite their obscurity, shows that God's record is meticulous. It's a reminder that every individual is known to God and part of His people's story, even if they don't have a prominent role in history.