When I was very, very young I thought that when you grew up you were given an "adult name." I spent a long time wondering what name I would be given (Elizabeth sounded so childish) and was actually a bit afraid of getting a scary adult one like my mother's (Harriet).
I eventually worked up the courage to ask my mother about it. Her reply boggled my mind.
A childhood belief about names

others believed things like this
- that when I grew to be an adult my parents would be children.— Rainbow
- I used to believe that killer bees would take over the world by the time I was an adult.— Kristy O.
- When I was a child, I thought that grown-ups were adult.— Gloria
- My brother thought that one adult was a dult and that one alert was a lert.Anon
- I thought adultery was when you acted too much like an adult as a kid and wondered whats so bad about that?— Butch McFear
- I always thought there was a drinking age for coffee, because it was an adult drink like beer and wine.Anon