
Regulus's parents considered him to be much different from his older brother Sirius Black. Relatives included Bellatrix Lestrange, a loyal Death Eater of Lord Voldemort's, Andromeda Tonks, who married a Muggle-born and was subsequently disowned by the family, and Narcissa Malfoy, who married Death Eater Lucius Malfoy. It is assumed that he was named after his great-uncle, also named Regulus, and his paternal grandfather, Arcturus. Regulus was born in 1961 into the wealthy, pure-blooded Black family, as the youngest son of Orion and Walburga Black and younger brother of Sirius Black. The Blacks in the early 1970s (left to right: Orion, Regulus, Walburga, and Sirius) He was younger than me, and a much better son, as I was constantly reminded." - Sirius Black remembering his brother

my idiot brother, soft enough to believe them. " I hated the lot of them: my parents with their pure-blood mania, convinced that to be a Black made you practically royal. Irma Black (née Crabbe) (maternal grandmother) †.Pollux Black (maternal grandfather/paternal first cousin twice removed) †.Melania Black (née Macmillan) (paternal grandmother).Arcturus Black III (paternal grandfather/maternal first cousin twice removed) †.Narcissa Malfoy (née Black) (maternal first cousin/paternal third cousin).Andromeda Tonks (née Black) (maternal first cousin/paternal third cousin).Bellatrix Lestrange (née Black) (maternal first cousin/paternal third cousin) †.Druella Black (née Rosier) (maternal aunt by marriage).Cygnus Black III (maternal uncle/paternal second cousin once removed).Alphard Black (maternal uncle/paternal second cousin once removed).Ignatius Prewett (paternal uncle by marriage).Lucretia Prewett (née Black) (paternal aunt/maternal second cousin once removed).Sirius Black III (older brother/third cousin) †.Walburga Black (mother/second cousin once removed) †.

Orion Black (father/second cousin once removed) †.
