Nimravis

Nimravis, the Crone of Winter, is one of the Qali Matra and a daughter of Epheos. Thus she is considered one of the Aiyu-Thani, along with her sister-goddesses, Aeylea, Voridis, and Thuraeya.
Her arrival is heralded by Turomë, the north wind, and she settles across the land when her sister Thuraeya has been driven away. Beneath her white mantle, the trees and growing things of Urva obey her command to slumber, awaiting the warm eastern wind Uatha and the onset of spring. 
Like her sister-goddesses ofthe Qali Matra, Nimravis has no organized cult in most "civilized" lands. Druidic and shamanic traditions among people such as the Vards, Suagirs, Thelbirs, or Daare Karsha are much more apt to venerate her (of course with widely varying rituals, and calling her by many different names in their own various languages).