Can't believe I was too thoughtless to LIU earlier. Per Encyclpedia Britannica (oder editions):

Philistia, a district embracing the rich lowlands on the Mediterranean coast from the neighborhood of Jaffa [note: now Tel Aviv] to the Egyptian desert south of Gaza. On the subsequent extension of the name in its Greek form, Palestine, see Palestine.

Palestine: There is no ancient geographical term that covers all the area now known as Palestine. Until the period of the Roman occupation the region was subdivided into independent provinces or kingdoms, different at different times, but never united under one collective designation. The extension of the name of Palestine beyond the limits of Philistia proper [that is, a part of the coastline] is not older that the Byzantine period. ... In the words of ..., it "has never belonged to one nation and probably never will."