[Nihtgenga]

Actually, yes. The middle ages did have orcs. Orc is Old English for Foreigner, monster or demon and was used to refer to the Normans invading Englaland in 1066.

EDIT- Well, technically that's actually the Dark Ages, not the Middle Ages. But most people don't know the difference anyway, and hey- the Normans were still controlling England during the middle ages anyway.