It's called Ireland today since the Scotians moved Scota to Scotland about 900 AD.
This is not a new discovery ~ rather, it's an admission that the ancient archives kept in Carvajal were correct.
Now, moving backwards, the leadership elite of the Western Celtic culture arrived in Iberia from the Black Sea several hundred years earlier than this according to the ancient stories.
Funny how this seems to fit with British Israelism.
Some sources I've read say the Scythians were the red headed freckled descendants of the Hebrew tribe of Dan, which didn't return to Israel after the Babylonian exile and became one of the 'Lost tribes of Israel'.
So, Dan supposedly migrated up around the Black Sea & disappeared to history. About the same time the Scythians appear around the Black Sea.
There were a lot of Celts in Switzerland at one time, but they were pushed westward by more-warlike tribes.