Grandparent names?

Chelsea • Married 06.06.15 💍 Dog mom of three 🐶🐶🐶 Angel baby Elliette 05.25.17 🎀 Rainbow baby Porter 5.15.18 🌈 💙

We announced to our families tonight that we’re having a baby boy. My MIL wants to be called Mama Turpin (our last name). Maybe I’m just crazy but I’ve waited long enough to be called Mama and I don’t want to share that title. What are some grandparent names that I could suggest? My mom and dad are Granna and Grandpaw to my nephew so I need something different for my in laws. There’s already a Grandmother, Maw Maw, and Granny in the family.