I could be totally wrong as I've only ever heard Glenfiddich (or was it Glenfidditch?) in relation to whiskey, but I'm pretty sure it's either Irish or Scottish - which totally makes sense with sounding Germanic because of different Norse (viking) clans/tribes invading and settling in various parts of the British Isles and intergrating into the culture/genepool of that area - especially in Dublin.

Uh, hope that helps?