Roulean was a star system located in the space of the Romulan Star Empire, in the galaxy's Alpha Quadrant.
History and specifics
The Roulean system was located in Romulan space in the Tiber sector.
By the 24th century, notable nearby systems in that sector included Tigelis and Xhuj. (Last Unicorn RPG module: The Way of D'era: The Romulan Star Empire)