My father and I are called father and son, my grandfather is called grandfather and grandson, what's my grandfather's name?

Hello, questioner, in fact, all the people above are right. I want to add that grandpa and grandson are not as targeted as grandpa and grandson, but they are more appropriate.

Grandparents have a range, generally referring to grandfathers and grandsons. Grandparents have a wide range. As long as they are your parents' grandparents, they can all be called grandparents.