A childhood belief about imaginary friends

Most kids I know of have imaginary friends who were human, or maybe a duck or something, but it's very rare to me that I come across someone with an imaginary friend as strange as mine.

You see, when I was very young--so young that I don't remember creating him--I came up with an imaginary friend of my own...
His name was George and he was a Werewolf. I have no clue where I came up with the idea of him, but he truly was my best friend for a while. I even have a little story I wrote about him and I in a journal of mine complete with a picture that simply re-enforced the memory I still have of him which is of a tall guy (no clue how old I thought he was) with brown tattered pants and brown hair with long sideburns and a prickly un-shaven face with hairy arms too.

After a while, I realized that George would be leaving me soon so I created a family of siblings and cousins for him to go with--including a young cousin named Jack who repetedly would fall through the ceiling.

Eventually George left me but of course I remember him...still I try and figure out where such a young kid would think up something like a werewolf though.