[wolfpat]

I thought this was well established fact.

http://en.wikipedia.org/wiki/Milesians_%28Irish%29

[bunkerhill7]

Researchers working for a private association called the Gaelaico Project now believe they’ve finally deciphered what it reads: “An Ghaltacht” or “Press 1 for Gaelic, 2 for Spanish, 3 for English”.

[Michael.SF.]

That is what I was taught.

The Gaelic people came from areas of France, Spain and Portugal and either fled to Ireland from fear (or defeat) of invaders, or as the result of exploration (likely a combination of both).