Vargamor - Scandinavia.

    The vargamor were women who provided human victims for wolf companions, often by promising sexual favors.
    In Sweden, old women who lived in the forest were said to have sorcerous powers, including having wolves under their control. For this, they were called Vargamor, "Wolf-crones".

Lopez.  Of Wolves and Men.
Porteous, Alexander.  Forest Folklore:  Mythology and Romance.  New York:  The MacMillan Co., 1928.  p. 87
Thorpe.  Northern Mythology.