I was reading through this thread and noticed that RG said that he had heard of Zanny in April of 2006. I just had a thought......
My mom prefers for my daughter to call her (Zani) b/c she feels grandma is too old for her.
She got the idea from Goldie Hawn. She was on Oprah shortly after Kate Hudson had her son Ryder. She did not want to be called grandma either. So she came up with Zani.
Since Casey did not work, did she sit at home and watch Oprah and this is where she heard Zanny? I am going to search and see if I can find out what year Goldie Hawn was on Oprah. I think she was promoting a movie at the time.