I used to believe that swing low sweet chariot was talking about some guy named Jerry-O. I may have read the word chariot but never heard it. Also, I thought "Jordan" referred to my mother's maiden name, not knowing of the river.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that the phrase "Mamma Mia" referred to a girl named Mia.Anon
- I used to think that swing music was called that because you listened to it when playing on the swing set.Anon
- When I was little I used to believe that comedian Jerry Lewis and rocker Jerry Lee Lewis were the same person.— Paul
- In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- I thought the term maiden name actually applied to women who were maidens.— Natasha
- In the 1990s, when I was a kid, I used to believe that Michael Jordan was the tallest man in the world!— Sara