OK, let's break this down.
Everyone knows that Dracula is from Transylvania, which is part of present day Romania.
Frankenstein literally means German Castle. The Franks were a Germanic tribe, Stein is Germanic for stone, but common in names of landscapes, places, and CASTLES.
Wolfman is from Wales, which is in central Great Britain.
Moor is a distinctly British word for "uncultivated land including hunting areas and low-lying wetlands", but the word is not used in Wales. The Welsh word for a moor is "Gweiadur". So I guess Darkmoor is better than "Darkgweiadur" (you know UC probably actually had this discussion, no proof, but logic says...).
So Darkmoor must be a generic "European" village on the edge of a moor where you could possibly encounter an angry dogman, a random German Castle/Manor, and a blood thirsty international Casanova. Oh, and a Windmill with a Tavern.
Sounds good to me.