What do you think this represents? Some kind of Northern cryptid? Folkloric creature? Have you heard of any names associated with an upright humanoid with a reindeer head?

It does not look like the Horned God, Cernunnos, which has a decidedly human head with antlers:

The appearance is not similar to the evil dark Yuletide Krampus, either, even though it is more animal-like with two horns that are definitely too small:

How about the Windigo/Wendigo? While most traditional representations of Windigo seem to look like eastern Canadian Sasquatch, there is a body of Wendigo art that appear to be angry upright elk:

Of course, sometimes an upright caribou, I suppose, is just a standing Christmas reindeer.

I had to ask, do you know of a cryptid name for this critter?