No: HPFGUIDX 103310 If Petunia and Dudley turn out to be magical. That would make Dudley a half blood. Dudley Dursley the Half Blood Prince. A scary, unexpected but rather interesting twist. Not to mention Dudley being one of the only two people in the world who are actually blood related to Harry makes him an interesting target for Voldemort. Cheers, Mandy