General An Aqualish named Kendu Ultho commanded separatist remnants of the Confederacy of Independent Systems against the Galactic Empire in 17 BBY, following the Confederacy's defeat in the Clone Wars in 19 BBY. Ultho and his troops aligned themselves with Guun Cutlax, a pirate lord of the Iska pirates in the Atravis sector of the Outer Rim Territories, during the Imperial Western Reaches Operation, which was part of the Reconquest of the Rim aimed at suppressing Separatist resistance and criminal activity in the Outer Rim. In that same year, Imperial forces killed Ultho at Ogoth Tiir, an astronomical location in the Outer Rim, during fighting that resulted in the capture of his forces and the conclusion of the Reconquest of the Rim.
The reference book The Essential Guide to Warfare, authored by Jason Fry and Paul R. Urquhart and published in 2012, included a mention of Kendu Ultho.