All of my grandparents died before I could talk. With my own children they called my parents and hubby's parents (Nana and PopPop and Grandmother and PopPop respectively). My grandchildren call me Nannie (to be different from Nana) and my hubby is PopPop to them.

My co-worker, who is Italian, just had her first grandson. He will call her Nonna (when he learns to talk...LOL!) and her hubby will be Poppi.