Rihannsu is the name that Romulans use for themselves, although their language is referred to as Rihan. It means "The Declared", and presumably stems from their declared choice to reject the teachings of Surak and leave the planet Vulcan. (TOS novels: Rihannsu: The Bloodwing Voyages). The term "Rihannsu" has also been defined as "Outcasts," in reference to their being blamed for the assassination of Surak and apparently having been forcibly exiled from Vulcan.