In Welsh mythology and folklore, Cŵn Annwn were the spectral hounds of Annwn, the otherworld of Welsh myth. They were associated with a form of the Wild Hunt, presided over by Arawn, king of Annwn. They are often depicted as white with red ears.
Welsh Terrier - Zippy, compact companion, always looking for action and entertainment. This breed loves to swim and dig. The "Welsh Terrier expression" comes from the set, color, and position of the eyes combined with the use of the ears. http://www.akc.org/breeds/welsh_terrier/index.cfm