Philistia (Philistines): sea people from Crete and Greece. They landed on the coast around Millennium BC and made their way south failing to conquer Egypt. Every time the Bible mentioned Philistines it says: “uncircumcised Philistines“.
The Sea Peoples is a generic term for several groups that contributed to the downfall of Bronze Age civilization. One of the groups, the Peleset, may have given rise to the words "Philistine" and "Palestine.
Sea Peoples in Sardinia, c. 1100 BC, artwork by Giuseppe Rava.
Peleset. This ethnonym, which has no earlier occurrence in the Egyptian sources, has been identified with the Biblical Philistines by Jean-François Champollion soon after his decipherment of Egyptian hieroglyphic. Now, the Philistines are generally considered newcomers in the Levant, settling in their pentapolis consisting of the towns Asdod, Askelon, Gaza, Ekron, and Gath at the time of the upheavals of the Sea Peoples.