maybe get her to chose her own name.
My mum is Mina (not due to hiding age, just thats what she called her fav grand ma), and my Dad is Poppy. DH's parents will be Nanna & Pop. (i think)
I had a friend, whos mother was Neenie to her grandkids, but, it did get abit irriating to her as if the kids where whinny, they would draggggg out the ee's.


The down side to having an unusal name, is you cant get cute little stuff like "I'm my nana's shopping buddy' type t'shirtss/bibs etc.