Reminds me of the Irish Chronicles that say the people came from Galicia in northern Spain, before that from northern Africa (possibly Phoenicians), all the way back to Scythia (the horse archers who smoked weed in tents). Seems like a stretch but I think there have been some DNA studies that confirm parts of it, but my understanding is the medieval monks who compiled the stories were trying to claim a link to the Mediterranean/holy land in order to connect their identities to the Bible. Maybe they were mixing up multiple different migrations to fit the narrative. I'm curious about what real historians/scientists think about it.