The Weasley Family Tree Fully Explained

Arthur Weasley is a man of simple means. A full-time employee of the Ministry of Magic, working in the Misuse of Muggle Artifacts Office, he puts in long hours to support the large family — with seven children in total — he has with wife Molly. What you may not know about Arthur is that he's a distant relative of Harry Potter's godfather, Sirius Black; his mother, after all, was Cedrella Black. Arthur's great uncle on his mother's side, Sirius Black II, was the great-grandfather of Sirius Black III, who befriends James Potter at Howarts, making Arthur and Sirius III second cousins, once removed. This could explain how and-or why Arthur shows such a fatherly disposition to young Harry and plays a similar role in the Chosen One's life.

It was Arthur, of course, who warned Harry about Sirius' escape from Azkaban, still believing at the time that Harry's godfather had been the one to betray his parents and that he'd killed Peter Pettigrew (Timothy Spall). We can forgive Arthur for that, since he was only acting in the boy's best interest. Two years later, when Harry is on trial for using magic outside of school while still underage — despite the fact that Minister Cornelius Fudge had jokingly told Harry that wizards aren't sent to prison for blowing up their aunts in "Prisoner of Azkaban" — Arthur is the one who escorts him to Ministry headquarters. Of course, Harry more than repays the favor and the kindness Arthur has shown him over the years when he tells Dumbledore that Arthur has been attacked after seeing it in a vision through his connection to Voldemort.