My Friend learned when she was little that Gym was short for gymnasium. For the longest time she thought her dad's name was Gymnasium because his name was Jim. He even told her his name was James but she still wouln't believe him and called him Gymnasium.
A childhood belief about names

others believed things like this
- Since the girls name Jackie is short for Jacqueline, I thought the boys name Jack was short for JackalAnon
- For the longest time I thought 90210 was a sitcom Anon
- i thought that you had like a box or something inside you to hold your soul for the longest time— jill
- I thought that Samson and Solomon from the Bible were the same person for the longest time...— Laura G.
- For the longest time I thought that Rudolph the Red-Nosed Reindeer had a very "chinese" nose...Anon
- For the longest time I thought Pig Latin was an actual language that they spoke in a part of Europe.Anon