Thoughts on Galicia?

[LKM]

The history of a Celtic heritage in Galicia as I understand has at least three parts: early identification of the peoples, trade, and immigration. As with everything, it is most likely far more complicated. Even the term Celtic has a more complicated history then just culture or language.

I think this list of Celtic tribes shows how the people were identified early in history in parts of Europe. A lot of these identifications of tribes in groups is due to how the Romans described and categorized the peoples.
https://en.wikipedia.org/wiki/List_of_Celtic_tribes

That region of Spain does have a history trade with Ireland (at least before the Renaissance time), yet as England took over more of Ireland the Irish had less trade with Spain. I'm not sure how the trade is between Galicia and Ireland is today. The early trade between Ireland and Spain is thought to be partially from the Celtiberians in Spain and some of the Irish tribes being related at some point in history, yet this is unknown.

As for immigration, there are stories of people from Ireland, Scotland, and Britannia (Roman Britain) going to Northern Spain throughout history. And people from Spain going to the British Isles. When the Angles and Saxons invaded Britannia after Rome pulled out of Britain both France and Spain had large numbers of immigrants from Britannia, especially in Galicia, Spain and Brittany, France.