The El-Aurian homeworld was a planet in the El-Aurian system that was the homeworld of a species known as the El-Aurians.
During the mid-23rd century most of planet's inhabitants were assimilated by the Borg. A small number of El-Aurian survivors fled the planet and scattered themselves throughout the galaxy. (TNG: "Q Who", "Ensign Ro", "I Borg")
In 2293, two ships, the SS Lakul and SS Robert Fox, were transporting El-Aurian refugees to Earth, but were destroyed, and only forty-seven refugees were saved. (Star Trek Generations) Martus Mazur was among the refugees from the El-Aurian system. (DS9: "Rivals")
In the non-canon Star Trek novel Engines of Destiny, the name of the El-Aurian homeworld is given as "El-Auria."