The "Peleset" of Egyptian texts mentioning the Sea Peoples are generally thought to be the Philistines.
There was a pre-Greek population in Greece called Pelasgians about which not much is known. One scholar argued that Pelasgians = Philistines but I don't think anyone else has endorsed that view.
What about King David's Cherethites and Pelethites? When will someone find some of their DNA?
Interesting stuff. The more separate peoples stay together in one location, the more blended their genetic DNA becomes The Spanish were in the Americas a mere century longer than the English (fall of Mexico City, 1521— landing at Plymouth Rock, 1620) but their DNA is far more blended with Native and African DNA than descendants of their counterparts of primarily English ancestry . . . in a mere century, less than 1.7% of recorded human history.