Well, when I joined I had one grandson named Thomas (the redhead in the avatar.) His other grandma is called Nana, which was my choice too, so to keep from confusion, I had to do something different. My given name is Modonna (pronounced the same as Madonna,) I go by Donna (you can see why!) so I combined Nana and Donna and the grandsons call me Nonny. So, at the time I was Nonny to T (Thomas) I guess I should be nonny2tnj now, which would be Nonny to T (Thomas) and J (Jackson) !
Oh and btw, cool question. I always wonder how people pick their usernames