Yeda

Yeda was the codename for a Rebel Alliance Safeworld and the capitol of the Yeda Rebel Alliance from 4 ABY to 172 ABY.

IN THE ISON NEBULA
Yeda was first assigned as the Yeda Rebel Alliance capitol in 4 ABY on a previously abandoned Rebel Alliance safeworld named Isis in the Greater Javin Region, Anoat Sector (SOURCE= Isis article on Star Wars Wookipedia). This planet remained the capitol of the Yeda Rebel Alliance until its vulnerability was revealed in 167 ABY.

IN THE ELROOD SECTOR
Once the ease with which Palestine's Empire could destroy the Yeda Republic capitol was revealed, the Yeda codename was applied to a different planet: Coyn in the Elrood Sector. This was also done because once all the bases of the New Republic were shut down by battle damage, the virus that had wiped out their links to the Galactic Holonet was wiped out as well. The Yeda Rebel Alliance forces were once again able to access the Holonet and thus updated Galactic Maps and Hyperdrive routes.

In late 172 ABY, Yeda moved back to the Isis system as the Yeda Rebel Alliance merged with Stan's Empire at Coruscant. This was because Palestine's Renegades had been defeated and a literal FORCEfield was revealed as the best defense against the Sith.