Tyrellia was a planet in the Tyrelli system, located in the galaxy's Alpha or Beta Quadrants. It was the homeworld of the advanced Tyrellian civilization.
History and specifics[]
Tyrellian knives from the Fourth Dynasty and Fifth Dynasties of the planet's history were highly sought.
In 2268, a trader at Wagner Trading Post had such a knife from Tyrellia for sale. James T. Kirk, Spock, and Leonard McCoy haggled for it, but the vendor's price went suspiciously low. Eventually Kirk acquired it. (TOS novel: Dreams of the Raven)