Eyak is an extinct Na-Dené language historically spoken by the Eyak people, indigenous to south-central Alaska, near the mouth of the Copper River. The name Eyak comes from a Chugach Sugpiaq name (Igya'aq) for an Eyak village at the mouth of the Eyak River. It was the first Alaskan language to go extinct in recent history.The closest relatives of Eyak are the Athabaskan languages.