waterfallcrossing
Amelia
Icicle,Blizzard,Noel,Toyland,Tinsel or Winter?

If I may be honest, I think all of these are a bit plain. They're so direct; simply names of objects and things. I personally like made-up words and/or words in other languages, perhaps with a suffix as well, better.
Hiberne is an example I came up with; it's 'winter' in Latin but changed up a bit. Something similar to "glacial" could be nice too.