if you're referring to the plump, rosy-cheeked fellow with the white beard, clad in red and white
winter clothing that goes around a flying sled and goes down the chimney every eve of christmas
without fail and goes ho ho ho ho!!!
No I don't believe though I used to when I was small
But if you're referring to St. Nicolas and all the boring attributes of a saint...
Yes---As a person who truly exists
but as a saint and all this catholic stuff...hmmmm...no comment heheh