Who is Robert Grandma and Grandpa?

There's no known person or character named "Robert Grandma and Grandpa." It's possible this is:

* A made-up name: Perhaps a nickname or joke within a specific group of people.

* A misspelling: It could be a misspelling of a real name.

* A fictional character: Maybe from a book, movie, or TV show.

Could you please provide more context?

For example:

* Where did you hear this name?

* What is the situation or story related to this name?

With more information, I might be able to help you figure out who or what "Robert Grandma and Grandpa" refers to.