The Origin of Johnn

As you are well aware, I spell my last name Johnn rather than John. It wasn't always this way, I had my name legally changed some years back. It has always bothered me that people always assume they know how to spell my name. They used to always get it right, now they always get it wrong. This gives me the opportunity to correct them right off, which gives me a social edge when meeting new people. There is absolutely no way you knew this before I just told you.