According to BabyCenter, common grandmother names are Grandma, Nana and Grammy. Other names include Granny, Mimi, Nan and Nanny. A grandmother’s name may be chosen by the grandmother, parent or child.
There are a wide variety of grandmother names, some more colorful and creative, such as Ama or Gramby, and others more traditional such as Nanny, Oma and Gram. More than half of all grandparents pick their own names. While the child’s parents may wish to pick the grandparent’s name, about a quarter of parents find that their child, as he begins to babble, bestows a completely different name to a grandparent.