I don't have a good grandpa name, but I had a student one time that called her grandmother, "Honey." It was sweet to hear her introduce her grandmother as her "honey!"
Jessica Cook
"You are God alone....You're unchangeable, unshakable, unstoppable that's what You are"
My daughter calls my dad "Pappy" and my wife's dad "Pop Pop". My mother she calls "Big Nanna" and my wife's mother she calls "Nanny". She is only three and I find it cute.