Depends if you’re going with the actual historical figure or the various legends that were combined to make the modern-day mythical character. The original Nikolaos of Myra was a Greek who lived in modern-day Turkey, certainly not a “Nordic” type.
EDIT: Here’s a recent reconstruction of what scientists think ol’ Saint Nick looked like based on analysis of his remains:
As the Daily Show joked, we couldn’t have Christmas today if Santa looked like that because he’d probably be placed on the no-fly list.
