Maternal grandmother - Nana
Maternal stepgrandfather - Roy (his real name)
Maternal grandfather (he died before i was born) - i guess, Grandpa
Maternal great-grandmother - Appy (RIP)*
*short version: my mom as a "wee one" said her grandmother looked happy. it sounded like "appy" and that's what she was called until she died 9/11/02. still a bit sad about that
Paternal grandmother - Gramma
Paternal grandfather - Grampa (RIP)