I think I've asked you about something similar before but I've always been stumped at this lol. In the Odyssey we get mentions of Sicilians explicitly, while also getting the name Thrinacia which is the ancient name of Sicily. My question is: was Thrinacia the original Greek name for Sicily and thus the Odyssey is explicitly referring to Sicily by name, or is the identification with Sicily a later thought and more like the source of the name of the real island in the first place (aka Greek settlers identified Sicily with Thrinacia and named it that). I guess this is an "egg or chicken" type question, really lol. I'm leaning towards the latter option since we get the name Sicily in the Odyssey too, I'm guessing both "Sicily" and "Thrinacia" got assimilated into the same concept at a later time.
Hope the question wasn't too confusing lol
Hahahaha yeah I remember you bringing Sicily up before haha and yeah man that definitely seems like the egg or chicken question! But yes I agree with you here that I lean more to the latter option myself. Like we know Homer uses the term "Sicily" (you can see that in my Melantho Analysis where we know that Melantho's mother was an old woman from Sicily) so the word Sicily is at least as old as Homeric times.
So either Homer implies that he uses both words simoultaneously like he does with Ilium vs Troy or as you said the latter of what you wrote seems to happen; that the area adopted the name because it was associated with the mythical isle. We do not seem to see that the homeric Thrinacia was this huge area that Odysseus and his men could explore. I think it is left assumed it is a tiny place otherwise Odysseus would have decided to move in its mainland in search of civilization or food. I think Homer lefts to be implied that Helios's island Thrinacia is a tiny place in the middle of the sea, possibly off the coast of Sicily especially since we see that they sailed for seven days in the sea so that means the isle was isolated and then Odysseus was pushed back to the passage of Skylla and Charybdis which is also associated with the passage around Sicily so that shows the island is a small one outside Sicily rather than Sicily itself
But that is how I read the passages.