This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Rougarou (French America)
The rougarou (alternatively as roux-ga-roux, rugaroo, or rugaru) is a legendary creature in French communities linked to traditional concepts of the werewolf. In the Cajun legends, the creature is said to prowl the swamps around Acadiana and Greater New Orleans, and the sugar cane fields and woodlands of the regions.
The rougarou most often is described as a creature with a human body and the head of a wolf or dog, similar to the werewolf legend. Other stories range from the rougarou as a rabbit to the rougarou being derived from witchcraft. In the latter claim, only a witch can make a rougarou—either by turning into a wolf herself, or by cursing others with lycanthropy.