Is ya a name for grandmother and in what language?

"Ya" is not a common name for grandmother in any language. It might be a nickname or a shortened form of a name, but it's not a standard term for grandmother.

To help you find the word you're looking for, please provide more context:

* What language are you interested in? Knowing the language will help me identify the appropriate word for grandmother.

* Is it a specific region or dialect? Some regions have unique terms for grandmother.

* Is it a slang term or nickname?

With more information, I can give you a more accurate answer.