Were they also from the Aegean, or from different regions entirely?

The Aegean Connection: What The Genetics Shows

The finding that the Philistines had significant Aegean ancestry is not, in itself, surprising given the archaeological evidence — but the specific nature of that ancestry is informative.

The genetic affinities documented in the early Iron Age Ashkelon individuals point toward populations that are genetically similar to people from the southern Aegean region and Cyprus during the Late Bronze Age.

This is consistent with a scenario in which the Philistines — the Peleset of the Egyptian inscriptions — originated from a zone that included the Aegean islands, the southern Greek mainland, Crete, and possibly Cyprus, rather than from a single, specific location.