This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Ragana (Lithuanian)
Ragana (a witch) was a magical feminine creature from myths and tales in both Lithuanian and Latvian Mythology. With origins from a Lithuanian word "reg?ti"(to see), Ragana was not only responsible for controlling the human overpopulation by converting them to stones, trees, animals or even eating them, but also could change the events which occur in the sky during the night.
Ragana can bless or curse, controls fertility and the milk supply of women and animals, causes and cures infertility and impotence. Ragana controls the weather, raising and allaying storms, and wind. She is the guardian of nature’s cycles: creation, growth, decline, and destruction.