Na-Dene (/ˌnɑːdɨˈneɪ/; also Nadene, Na-Dené, Athabaskan–Eyak–Tlingit, Tlina–Dene) is a Native American language family that includes at least the Athabaskan languages, Eyak, and Tlingit languages. An old inclusion of Haida is now considered invalid.In February 2008 a proposal connecting Na-Dene (excluding Haida) to the Yeniseian languages of central Siberia into a Dené–Yeniseian family was published and well received by a number of linguists.