House of Black
"My grandfather and my father knew how to do some magic tricks, but not enough to be accepted into school. It seems that only I had the capacity to be at Hogwarts."
Julius Black was a part-squib male, grandson of Marius Black, the son of Claudius Black and the father of Livius Black. According to Livius, Mr. Black had been a little suspicious when Professor Longbottom appeared on the eleventh anniversary of his son, but later became convinced that Neville was not a bad person.