Gondulphus Graves was one of MACUSA’s original twelve aurors (Pm).
Graves did not survive to old age (Pm).
The descendents of the original twelve aurors have a special place in American wizarding society; Graves's family is still influential in American wizarding politics today (Pm).
Graves = possibly suggesting his early death.
Regarding etymological note on his surname, cf. his colleague Robert Grimsditch. -BB