Family disagreements are fairly common, but did Uncle Tom really have to cast a killing curse on Harry? Okay, so they may not be nephew and uncle, but this is one of the many bombshells that J.K. Rowling has dropped over the years. The wizarding world is incredibly small when you compare it to the general population. The fact that Hogwarts is the only prominent school for witches and wizards in the whole of Britain is a pretty obvious sign of that. When it comes to family relations, then, things get a little bit complicated. In a web chat in 2007, Rowling confirmed that both Harry and Voldemort are connected to the medieval Peverell brothers, the three brothers who in legend each possessed one of the Deathly Hallows. She went on to say that this means the two are technically related. I don't suppose Voldemort ever made the Potter family Christmas card list.
