Winter/wynter
snow
Eira ( snow in welsh)
Scarlett
Crimson
Aspen
Cortin
Vail
Demeter 'demi for short
Frost
Crystal
Aubin
Bianca
Bronwen
Finola
Gaenor
Gwen
Kenyon
Olwen
Rowena
Whittaker
Nia
Imani
Bodhi,
Epiphany
Valentine
Abner
Chiara
Eleanor/Eliora
Helen
Kiran
Lenore
Lucinda
Lucius
Lucy
Lux
Luz
Noor
Nora
Thea
Uma
Zohar and Zohara
Estelle, Estella, Esther, Seren, Stella- All have meaning related to star
Lucia, Lucian, Lucius, Lucy, Lux
Bianca, Blanca- White in Italian, Spanish
Blanche- French for white
Lumi- Finnish for snow
Neige- Snow in French
Nevada- Snow-capped in Spanish
Nieves- Snow in Spanish
Robin
Solstice
Winter
Yuki, Yukiko- Japanese, happiness + snow, and happiness + snow + child
Yule- Winter festival
For Posterity:
Bell, Belle
Carol
Christmas
Claus, Nicholas, Nicola, Nicole- For jolly old St. Nick
December
Noel, Noelia, Noelle
Rudolf
Hope that helps!