Harry Potter and Lord Voldemort are related through Harry's mother, Lily Evans. Lily was a Muggle-born witch who fell in love with James Potter, a Pure-blood wizard. They married and had a son, Harry. When Voldemort tried to kill baby Harry, the Killing Curse rebounded off of Harry and destroyed Voldemort's body. This left Harry with a lightning bolt scar on his forehead, which is a constant reminder of the connection between him and Voldemort.
As they say, blood is thicker than water. And in the case of Harry Potter and Lord Voldemort, that couldn't be more true. The two are related by blood; specifically, through Harry's mother Lily Evans.
Lily was a Muggle-born witch who fell in love with James Potter, a Pure-blood wizard. They married and had a son, Harry. When Voldemort tried to kill baby Harry, the Killing Curse rebounded off of Harry and destroyed Voldemort's body. This left Harry with a lightning bolt scar on his forehead - which is a constant reminder of the connection between him and Voldemort.
This connection is further explored in the seventh book of the series when it is revealed that Dumbledore had been trying to protectHarry all along because he knew that as long asHarry lived,Voldemort would never truly be able to rest easy. He would always be looking over his shoulder for fear thatHarry might come after him again one day - and he would be right!