Well, my Camino CV is still quite modest (less than 1000 kms). There are here quite a few members here with several thousands kms on their legs..
In relation to Celtic history on my Caminos, the castro in Castro (C. Primitivo) that is still in Asturias but in the Galaic zone.
In toponymy:
-River Tambre (Inglés and SdC -Fisterra) with Tam=dark, like rivers Thames and Tamar in England.
- Dumbria (SdC-Fisterra) with Dum=forthill, like Dundalk, Dundee, Dunquerque.
- Betanzos (C. Ingles) (old Brigantium) like godess Brigantia and the Brigantes tribe in England
- Lugo (C. Primitivo) form god Lug?? (in discussion).
- Myself
. I am from 15 Kms from Betanzos and according to DNA analysis, I have haplogroup R-P312 (father line) origin Celt.
On your trip from Fisterra to Ferrol you pass the supposedly more Celtic area in Galicia.
- Pais de Bergantiños (from Brigantinos) with capital in Carballo and the Arco Artabrorum (from Coruña to Ferrol).
Buen Camino, Bo Camiño.