Although often overlooked by scholars outside Wales itself, Welsh folktales have had some influence on several prominent twentieth-century fantasy texts. For the most part, they have added a sense of "otherness' to some texts in what might be termed a "romantic" or perhaps fanciful derivation; to others, they add a touch of violence, sexuality and political struggle. I want to survey some texts in the first category before concentrating on two which fall decidedly into the latter.