I am Grandma Kay to my one and only grandson.
When our kids were little they had 3 great grandmas, and 3 grandmas (my husband had 2 stepmoms). So the great grandmas were Grandma Nelson, Isabella, & Grams. The grandmothers were Grandma Ruth, Grandma Daisy, Grandma Fran. It was the only way to keep them all straight. Grandfathers were: Grandpa Walter and Grandpa Scotty.
When I was little my only granparents were: Grandpa Red (he had red hair) and Izzy. My grandmother never wanted to be called mom or grandma. I always called her Isabella. I couldn't call her Izzy. Only her brother was allowed to call her Bella.