If you read this Gayle your struggle with what to be called as a Grandmother is puzzling to me.
First your becoming a Grand Mother! to hold flesh of your flesh is the most thrilling moment of your life. Who cares what they call you as long as they recognize who you are. It’s an honor and it’s only because you gave birth to their mother or father.
It’s has nothing to do with age
It has everything to do with how you treat them and what you do with them. Mother Earth. Really, I don’t think so, go with your name, even that would be better