My grandparents were Nana and Boppa (mom's parents), Grandma -first name- (dad and stepdad's mothers), Grandpa -first name- (stepdad's stepdad), and Granddaddy (dad's dad) and Granddaddy -first name- (stepdad's dad).
My kids call my parents Mawmaw and Pawpaw (stepdad) and Little Pawpaw (dad, who isn't short, just shorter than my stepdad
). We don't have contact with my husband's family.