<page_title> Southern Athabaskan languages </page_title> <section_title> Comparative phonology </section_title> <table> <cell> Navajo <row_header> Proto- Athabascan </row_header> <row_header>  </row_header> </cell> <cell> Western Apache <row_header> Proto- Athabascan </row_header> <row_header>  </row_header> <row_header> Navajo </row_header> </cell> <cell> Chiricahua <row_header> Proto- Athabascan </row_header> <row_header>  </row_header> <row_header> Navajo </row_header> <row_header> Western Apache </row_header> </cell> <cell> Mescalero <row_header> Proto- Athabascan </row_header> <row_header>  </row_header> <row_header> Navajo </row_header> <row_header> Western Apache </row_header> <row_header> Chiricahua </row_header> </cell> </table>
The Southern Athabaskan languages consist of the Western Apache, Navajo, Mescalero, and Chiricahua.