Adam Clarke on Jeremiah 47:4

To spoil all the Philistines - These people, of whom there were five seignories, occupied the coast of the Mediterranean Sea, to the south of the Phoenicians.

Tyrus and Zidon - Places sufficiently remarkable both in the Old and New Testament, and in profane history. They belonged to the Phoenicians; and at this time were depending on the succor of their allies, the Philistines. But their expectation was cut off.

The remnant of the country of Caphtor - Crete, or Cyprus. Some think it was a district along the coast of the Mediterranean, belonging to the Philistines; others, that the Cappadocians are meant.