Freybug is a monstrous Black Dog from medieval English folklore, specifically from Norfolk. Like most supernatural black dogs, it was roughly the size of a calf, and wandered country roads terrifying travelers. The name "Freybug" is reportedly mentioned in an English manuscript from 1555.
- Matthews, John (2005). The Element Encyclopedia of Magical Creatures: the Ultimate a-Z of Fantastic Beings from Myth and Magic. New York: Sterling. p. 220. ISBN 1-4027-3543-X.