I became Nana. It's a frist name - Me. I have 3 granddaguthers. The name came with the first one. My daughter decided she wanted something easy for the child to say. My SIL parents are Grandma & Grandpa (insert last name here) Formal. Not on a first name basis with the kids. I highly recommend that - the first name basis thing. Congrats & welcome to the very best club in the Universe!