Dagur the Deranged is a former villain turned ally of Hiccup and the Dragon Riders in DreamWorks Dragons: The Series, based on the books/films How to train your Dragon.
A famous bearer of this name is Dagur Kári, an Icelandic film director famous for “ Nói Albinói ” (Noi the Albino) “ Fúsi ” (Virgin Montain). He was born in Paris, France on 12 december 1973.