The people of that era would have thought so. The Iliad and the Odyssey (if they have any basis in reality) might be examples of that period seen through a lens of mythology.
Very possibly a subset of the Sea Peoples were Greek. Egyptians reported the "Ekwesh" (which might be the Egyptian word for Achaeans) and the "Denyen" (which might be the Egyptian word for Danaans) among the Sea Peoples.
