What is the Welsh word for Santa?

There isn't a direct Welsh word for Santa Claus, as the tradition of Santa is largely an American one. However, there are a few ways to translate it:

* Siôn Corn: This is the most common and literal translation, meaning "John Corn". It's based on the Dutch Sinterklaas, and is used to refer to Santa Claus in Welsh-speaking communities.

* Tad Nadolig: This literally means "Christmas Father", and is another common way to refer to Santa Claus.

* Y Dyn Coch: This literally means "The Red Man", and is less commonly used, but can be understood as a reference to Santa's red suit.

Ultimately, whichever term you choose will depend on the context and the audience you are addressing.