Tyrellians are a civilization from the planet Tyrellia in the Tyrelli star system.
Tyrellian knives from the Fourth Dynasty and Fifth Dynasties were highly sought. (TOS novel: Dreams of the Raven)
In 2369, five Tyrellians were serving aboard the USS Enterprise-D. (TNG episode: "Starship Mine")
Sivadeki, a female Tyrellian, was a member of Starfleet in the 2370s and 2380s and served aboard the USS Robinson. (ST - Typhon Pact novel: Rough Beasts of Empire)
Four Tyrellians, including Sivadeki, were incapacitated by the Glant in 2386, necessitating emergency transports to sickbay. (DS9 novel: Original Sin)