Werwulf is a colourway with a grey base and dark grey streaks, accented with dark brown and burgundy speckles.

In folklore, a werewolf (from Old English werwulf 'man-wolf'), is an individual who can shapeshift into a wolf, or especially in modern interpretations, a wolf–humanlike creature, either purposely or after being placed under a curse or affliction. It's transmitted by a bite or the occasional scratch from another werewolf, with the transformations occurring on the night of a full moon.

The persecution of werewolves and the associated folklore is an integral part of the "witch-hunt" phenomenon, albeit a marginal one, with accusations of lycanthropy being involved in only a small fraction of witchcraft trials. During the early period, accusations of lycanthropy (transformation into a wolf) were mixed with accusations of wolf-riding or wolf-charming. The phenomenon persisted longest in Bavaria and Austria, with the persecution of wolf-charmers recorded until well after 1650, the final cases taking place in the early 18th century.

After the end of the witch trials, the werewolf became of interest in folklore studies and in the emerging Gothic horror genre. Werewolf fiction as a genre has premodern precedents in medieval romances (e.g., Bisclavret and Guillaume de Palerme) and developed in the 18th century out of the "semi-fictional" chapbook tradition. The trappings of horror literature in the 20th century became part of the horror and fantasy genre of modern popular culture.