In the 'kinda sorta applicable' category is Carla Speed McNeil's Finder, which is set in a far off future with various races, creeds, social castes, etc. - some of them are not dissimilar to ones in our world, others more culled from imagination. There's a nomadic group called the Ascians who're clearly based on Native Americans, but have elements of other aboriginal cultures. The main character, Jeager, is half Ascian and "half redneck."