This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Beast of Gevaudan (France)
The Beast of Gevaudan is the historic name associated with a man-eating animal or animals that terrorised the former province of Gevaudan, in the Margeride Mountains of south-central France between 1764 and 1767. The attacks, which covered an area spanning 90 by 80 kilometres, were said to have been committed by one or more beasts of a tawny/russet color with dark streaks/stripes and a dark stripe down its back, a tail "longer than a wolf's" ending in a tuft according to contemporary eyewitnesses.
It was said to attack with formidable teeth and claws, and appeared to be the size of a calf or cow and seemed to fly or bound across fields towards its victims. These descriptions from the period could identify the beast as a young lion, a striped hyena, a large wolf, a large dog, or a wolfdog, though its identity is still the subject of debate.