The Ilosians were a sentient species that evolved on the planet Ilos. They expanded to hundreds of nearby worlds such as Ilos Minor, before being enslaved by the Hutt species and engulfed within Hutt Space. They were able to retain more individual freedom that most Hutt client species due to their economical and technical prowess.
During the Yuuzhan Vong War, the Ilosians suffered great losses at the hands of the extra-galactic invaders.
*The Essential Atlas