Ourg

The Ourg are an extinct ogre-like race. They were the race of General Graardor. You can find their bones in the Zogre coffins, after you complete Zogre flesh eaters.

It was found out that they are Graardor's race when Armies of Gielinor was released on FunOrb. On that game, the Ourg are one of Bandos's units (which is right, as Graardor is Bandos's general in the God Wars Dungeon).