The Sinkiuse-Columbia were a Native American tribe so-called because of their former prominent association with the Columbia River. They belong to the inland division of the Salishan group, with their nearest relatives being the Wenatchis and Methows. The Sinkiuses called themselves .tskowa'xtsEnux, or .skowa'xtsEnEx (meaning has something to do with "main valley"), or Sinkiuse.
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