I'm Gran (to my grandsons), My mother is Nana and my Grandmother is Nan-G
My niece had everyone figured out at 2 1/2. Goes as follows:
The Grandma who takes me to smell the cows.
The Grandma with the Papa who takes his teeth out.
The cucuoo Grandma.
The Nana and Papa with the Bailey.
Nan-G
I hope you don't get any of the "crazy" names!