This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Bloody Bones (Irish)
Bloody Bones is a bogeyman figure in English and North American folklore whose first written appearance is approximately 1548. As with all bogeymen the figure has been used to frighten children into proper deportment. The character is sometimes called Rawhead, Tommy Rawhead, or Rawhead-and-Bloody-Bones (with or without the hyphens).
In the Southern United States, Rawhead and Bloody Bones are sometimes regarded as two individual creatures or two separate parts of the same monster. One is a skull stripped of skin that bites its victims (Rawhead) and its companion is a dancing headless skeleton (Bloody Bones). In one cautionary tale a gossip loses his head to the monster as punishment for his wicked tongue.