Galen IV
From Memory Alpha, the free Star Trek reference.
Galen IV is the fourth planet of the Galen system, formerly the site of a Federation colony.
During the 2350s, Galen IV was disputed between the Federation and Talarians, who saw the Federation as encroaching on their territory. In 2357, the planet was attacked by Talarian forces, commanded by Endar. All the colonists were believed to have been massacred, but a single survivor emerged years later as Endar's adopted son Jono. (TNG: "Suddenly Human")
- It is unclear whether Galen IV is still under Federation jurisdiction.
