I have been called many names,
through the course of years.
I may have been a real person,
but I always bring lots of cheers.

I am known all over the world,
and I come on a winter's night,
to spread joy and holiday spirit,
and to set children's faces right.

If you still don't know my name,
just read on a little more,
I live in a house on top of the world,
and little children I adore.

Who am I?