Narcissa Cassiopeia Potter (née Black) (b. 17 December 1959) was a half-blood witch and biological daughter of Swiss Quidditch player Sven Heydrich and Druella Black, though raised by Druella and her husband, Cygnus Black III. She is the sister of Andromeda Tonks and half-sister of Bellatrix Lestrange. She attended Hogwarts School of Witchcraft and Wizardry from 1971 to 1978, and was Sorted in Slytherin house.