[quote=@KazAlkemi]
[@PrinceAlexus]
Ooo maybe we could be relatives or something neat like that. 
[/quote]

All the pure blood are :)

If your a pure blood family. There all at least distant cousins or such with each other somewhere down the line. 

These are the few pure. Pure bloods left. 28 families and by present harry Potter least one is extinct.

http://harrypotter.wikia.com/wiki/Sacred_Twenty-Eight