Sirius Black was sorted into Gryffindor house at Hogwarts. He was the last heir of the House of Black, a once notable Pure-blood Wizarding family. His parents, Orion and Walburga Black, were both Blacks by birth and second cousins. Sirius had a younger brother, Regulus Arcturus Black, and three older cousins: Bellatrix Lestrange, Andromeda Tonks, and Narcissa Malfoy. Sirius bucked the trend in the Black family by being sorted into Gryffindor as opposed to Slytherin, like the rest of his family.