The Urwyzden were a humanoid civilization native to the Urwyzden system. They were described as about the same height as a teenaged Ferengi, with gray wrinkled skin.

By 2377, the Urwyzden had populated all three of the planets in the system, which were joined together in a Confederacy. In this year, the governments of all three worlds bought weapons from Gaila and Brunt, which caused civil war to erupt; this war only came to an end after Gaila's role in starting it was revealed. (ST - Seven Deadly Sins novella: Reservoir Ferengi)