Congrats Ty and Lily. My kids call my wifes grandmother Big Grandma. I know you were contemplating what your name would become. It's been my experience with my kids, they will call you what they will. My mom and dad forced their name as Mama and Poppa. But stepdad became grandpa, Dads significant other became Poppa Jim, wifes parents became Grandma and Grandpa. Hell even aunts and uncles naturally get named... Nini, Schell, Bobo, Bubby, and I became Monster for my nieces and nephews. Its a great, personalization as it happens. Enjoy the new addition, and again congrats.