The holocron of Dathka Graush refers to a Sith holocron that Sith Lord Dathka Graush personally constructed.
Living approximately 7,000 years prior to the Battle of Yavin, Dathka Graush possessed great talent in Sith alchemy. Around half a century following his victory in one of Korriban's regular civil conflicts, where he then formed a ruling dynasty over the majority of the planet, he was interred there.
The holocron created by Graush was interred within his tomb, accompanying his Sith sword and a Sith amulet.