When my little sister Heather was 4 (she's now 22), she LOVED the name Ashley. She used to go around telling people "My name was really Ashley before it was Heather." I don't know how long she believed this.
A childhood belief about names

others believed things like this
- We told our little sister that she had a long bushy tail and she fully believed us for ages!!Anon
- When I was a child I used to believe stars were the dead people who we loved— Anaïs
- I believed that Reindeer loved popcorn, and so I would cook a bag and scatter it on the porch.— Popcornsanta
- I thought that 1983 went on for 3 years - had to ask my sister who decided how long a year lasted.— Sally
- I thought gay people were old men with very long beards.Anon
- I believed that if I looked too long in the mirror admiring myself the Devil would appear.— Paul Elletson