When my son married his wife last year, she had a 5 year old (Zach) from before.
He calls her grandmother "Grandma" her mother "Mommo" and started calling me "Grandma Sue".
I really wanted to be something else, so I told him that I wanted to be called Yia Yia, ( I have 2 Greek Friends)
so I am Grama Yia Yia. I works great for me. Hopefully our new one (Noah) calls me the same when he learns to talk.
Happy quilting,
Susan