Read Jeremiah 47:4 Note: “Caphtor” only appears in the Bible three times. The first Time, Deuteronomy 2:23, is when the Hebrews are in the wilderness and we learn that a people called Caphtorim came from Caphtor and settled in Gaza after they defeated the Avvim. Of course, Gaza is the place the Philistines settled in Canaan. Records also show that the Philistines reached Gaza by way of the island of Crete.
Note: The Lexham Bible Dictionary states: Archaeologists have shown that the Philistines can be traced back to the Aegean (e.g., Dothan and Dothan, People of the Sea; Mazar, Archaeology). From there, they settled in Crete for a time before carrying on to Canaan and attempting to invade Egypt.
Note: The Eerdmans Companion to the Bible tells us that Caphtor, the "place of origin of the Philistines, [is] usually identified as Crete
Note: David Gosdeck, in the People's Bible Commentary: Jeremiah/Lamentations, writes: “The Philistines were part of a larger migration of peoples, called the Sea People, who poured down over the eastern Mediterranean during the 1400s b.c. Because the Philistines had overrun Crete (here called Caphtor) before arriving in Palestine, they are referred to as “the remnant … of Caphtor.”