What was the name of the secretive vampire organization in the original World of Darkness?

Answer 1

Which one? You're probably looking for The Black Hand.

Answer 2

their were many. the main one was the camirilla, which mainly consisted of vampires trying to pass as human most of the time. most of the clans that made it up were the: ventrue, toreador, gangrel, brujah, tremere, malkavain, and the Nosferatu. their main rival was the sabbat, vampires obsessed with living out the monstrous side of their vampiric nature. the main clans were the lasombra and the tzimiche however, members of the other clans who did not want to pretend they were human also were members of the sabbat. these vampires were usually called anti-tribu, an example would be ventrue anti-tribu, or brujah anti-tribu etc. the black hand was a secret order inside the sabbat (all black hand were sabbat, but not all sabbat were black hand). the other third group was the innconu. this sect monitored the other vampires to keep an eye on what the different clans or groups were up to. the innconu held only the most powerful vampires and its members generally didn't involve itself in the arcane politics of the other vampires.

Answer 3

Gargoyle Bloodline