Syrrannite

The Syrrannites were a Vulcan political movement in the 22nd century that believed the teachings of Surak had been corrupted over time and were determined to follow the true path. 

Mirror universe
In the mirror universe, the Syrrannites were one of the dissident groups that were supported by the Terran Empire in their attempts to conquer worlds more technically advanced than them. Members of this group had high status compared to other alien conscripts in Starfleet. Commander T'Pol, the science officer of ISS Enterprise (NX-01) was one such individual. (Before In a Mirror, Darkly)