There’s always a lot of discussion about the nickname a grandchild will call their grandparent. It seems like there are very few families where «grandma» and «grandpa» will suffice. You’re either Pee Paw, Gigi, Mee Maw, Gammy, Gran Gran, or who knows what. I think many of these nicknames arise because grandparents don’t want to feel old, so they think being called «Gigi» will conceal the fact that they are, in fact, a grandparent. 

As much planning as goes into these names, it’s often the grandchildren who come up with them. My grandma was supposed to be «Grammy,» but I couldn’t pronounce my Rs, so we went with «Gammy.» The name should be something the kids like, rather than what the grandparents insist upon. This same logic can be applied to the names/titles step-children call their stepparents. The comfort and opinions of the kids matter more than the adults’ feelings.