Graves' mother was from House Black, one of the Sacred Twenty-Eight.
...years later, after Sirius Black dies, and elderly Graves finds himself (quite accidentally) Lord Black. (His husband, Newt Scamander-Graves, laughs and laughs and LAUGHS).
Cue Graves descending on the British Wizarding World with all the grace and subtly of an elephant as he kicks ass, takes names, and gets stuff done.
Original!Graves/Newt - Lord of the House of Black
...years later, after Sirius Black dies, and elderly Graves finds himself (quite accidentally) Lord Black. (His husband, Newt Scamander-Graves, laughs and laughs and LAUGHS).
Cue Graves descending on the British Wizarding World with all the grace and subtly of an elephant as he kicks ass, takes names, and gets stuff done.