Why do we do those things to our kids
I guess because our parents did it to us?
No, I have to plead stupidity. Both my wife and I have perfectly normal, run-of-the-mill names (though you'd be surprised how many people can't spell "Michael").
It actually didn't hit me until she started Kindergarten, and by then it was too late. She came home from school one afternoon and asked me about it. I explained it to her, apologized, and offered to change it to the correct spelling which she declined.