Some romans, even though they were fighting the celts, adapted some of the celtic gods like Epona, the gauls god of horsemen By the way I would be Celtic guy.
my beliefs grow as I do. I don't ascribe to one particular category of pagan because I draw from so many as inspiration (slavic legend, celtic traditions, wicca, various literary works, I guess you could call me eclectic or even a practicer of chaos magick), not to mention somewhat bizarrely including such concepts as fractal geometry and quantum mechanics as a foundation. It seems really weird upon reading it, but it works for me.