My sisters friend believes that when you become a grown up, you get your grown up name. One day she was talking to her mum and asked "what is my name going to be when i grown up? and what was your name when you were a little girl?"
A childhood belief about names

others believed things like this
- I used to believe that grown-ups were born "grown up" and that I would stay a little kid forever.— Still A Kid
- I thought grown ups were born grown ups.— mea
- I used to believe that grown-ups were born grown up.— Juleen
- I used to believe that cabbage was lettuce that had grown up.— JHR
- I used to believe that every time i went in a store that the grown ups had to buy me something.— jvf
- I used to belive all grown ups went to bed at midnight.Anon