Arcturus Black was an early member of the House of Black, and was the brother of Cygnus and Misapinoa, and uncle of Phineas esigned based on the Harry Potter series. Uncle of Phineas Nigellus and his siblings (Sirius, Elladora, and Isla), but his precise relationship to other known members of the Black family is unknown. #HarryPotter #Black #Narcissa #Malfoy #Bellatrix #Black #Arcturus #LexLennon