Wife of Cygnus Black, a great-grandson of Phineas Nigellus Black, and mother to Bellatrix, Narcissa, and Andromeda (BFT).
Grandmother to Draco Malfoy and Nymphadora Tonks, great-grandmother to Scorpius Malfoy and Teddy Lupin. Aunt to Sirius Black and Regulus Black.
Likely related to the Death Eater named Rosier and to Evan Rosier, a classmate of Severus Snape. -BB