In Scotland many people call him "Santa Claus" or "St. Nicolas" alot of people don't think it's true but it is. All they call him are those two or maybe "Sunty Clus"
Santa Claus
People in Ireland call him Santy, Santa and Santa Claus. Santa Claus comes from Saint Nicholas and can then be shortened to Santa Claus or just Santa or Santy. So people in Ireland use those names, like people in many countries do.
We canadians call him Santa Claus, also. Don't worry about it.
Santa Claus
They call him Santa Claus. Exactly the same name as you call him.
People in Pakistan call Santa Claus Baba Christmas
People in England often call him Father Christmas, but some of them call him Santa Claus as well.
It is the same Santa what visits all over the world a jolly person, fat, long white beard, red suit, black shoes, may wear glasses or may not.
They call him Santakukoru.
I don't know, what do people in Madagascar call Santa Clause?
Julemanden.