Heligoland

From Felice Vinci's "The Baltic Origins of Homer's Epic Tales":

"After the Peloponnese, the Catalogue mentions Dulicium and continues with Ithaca's archipelago, which was already identified by making use of the indications the Odyssey supplies. We are thus able to verify the consistency of the information contained in the two poems as well as their congruity with the Baltic geography. After Ithaca, the list continues with the Aetolians, who recall the ancient Jutes. They gave their name to Jutland, which actually lies near the South-Fyn Islands. Homer mentions Pylene in the Aetolian cities, which corresponds to today's Plön, in Northern Germany, not far from Jutland. Opposite this region, in the North Sea, the name of Heligoland, one of the North Frisian Islands, recalls Helike, a sanctuary of the god Poseidon mentioned in the Iliad (it is remarkable that an old name for Heligoland was Fositesland, where «Fosite», an ancient Frisian god, is virtually identical to Poseidon)."

Here's an interesting link on Frisland:
http://www.angelfire.com/folk/frisland/frisland.htm

and Fosite:
http://www.geocities.com/Athens/Academy/5595/gods/forseti.html

This one is a good read...