What are/were your grandparent names?
My husband's mom is Dranny, my stepmom is Grandma #1 (she has an identical twin who we call Grandma #2), my mom was Chewy Grandma because she had a dog named Chewy, my middle son's grandparents are Nonna Red and Old Dude, and my oldest son's grandparents are Grandpa and 'Not the Grandma' (she treats my other kids as grandchildren too
)