There are all sorts of theories about the Sea People. Obviously they were accomplished sailors who arrived on the Levant coast and Egypt as invaders so you’d look to the northern part of the Med.
So they could be sea-faring peoples from the Greek peninsula or islands. Might be forerunners of the Phoenicians.
Send a private email to Sunken Civ and he’ll give you links galore along with his educated opinion. He might even start a new thread to deepen your obsession. :-)
Imo, this subject area is one of the more fascinating in history.
There was, apparently, so much going on and so little solid understanding.
Thanks for the suggest on Sunk. But, I’m already mooching too much from him just by enjoying all the links he provides the ping lists.