[quote=@HereComesTheSnow]
Would "Borea Gigas" be a decent enough moniker for a wintery form of a Geist, then? Trying to follow the theme they seem to have set with "Northern Giant" in latin. Maybe "Polar" as well.
[/quote]

Too complicated. :P Just call it the Abominable Snowman and be done with it.

"Geist" is German, so why not find a more Germanic name?