I hate how J.K. made almost EVERY character related in some way. Harry has Charlus Potter, a man married to Ginny's grandparent. Rose and Scorpius are cousins, 3rd or 4th. "Our Teddy. With our cousin". They're both cousins. Tonks is Ginny's 3rd cousin I think and Victoire is her niece. Arthur and Molly both share ancestry DIRECTLY from the House of Black, check it out if you don't believe me. I understand the other pure-blood families like The blacks (Sirius and Regulus' parents are 1st cousins) because they don't want any Half-blood/muggle born ancestry but the "blood traitors" like Harry and others is just pretty disgusting. It adds this *ncest-like theme to the story that I hate. (Unrelated note, I discovered most of the Malfoys aside from Lucius, Draco and Narcissa and Draco's grandparents are actually half-blood due to the muggles and wizards living together prior to the statute of secrecy.)