It's virtually impossible to create normal character names that haven't been used. I am sure there are loads of Linzi Hugheses and Michelle Hamiltons.
But one of the characters in my novel "Money Can't Buy Me Love" (coming out in September with Secret Cravings Publishing) is an obnoxious footballer who plays for Manchester United. Obviously he has to be fictional as I am going to have him do all sorts of distasteful things and he is not a very nice person.
Obviously I thought he was kidding at first but played along and looked him up - and guess what!
Sean - if you're reading this - sorry! It's not you - honest!!
Maybe you should name him Sheaun? Amazing the things characters put us through!