I'm not a grandmother yet, but just for input,I called my one grandmother Nene, the other one Gram, my kids, called my mother Betty Lou, because Betty was her name, and Betty Lou is a Sesame Street character and my youngest son started calling her that early on. I've decided that if I have grandchildren, I want to be called Pippa. I just think its so cute, and I want to be a cute grandmother, not a scary Grandmother!