[Verginius Rufus]

Galatia in Turkey was the land of the Galatoi (Celts), although the area included non-Celtic-speakers...like the people addressed in St. Paul's letter to the Galatians (which was written in Greek).

Galatea (Galateia) is an unrelated name from Greek mythology, found already in Homer and Hesiod.

I don't know if Galicia in Poland (also spelled Galitzia, Galizien, Galicja) is connected to the ancient Galli or not.

[Renfield]

There's also a Galicia region of Spain (Northwest). Yes, it's Celtic.