Eonavian or Galician-Asturian, (official name by Act 1/1998, March 23 of Principality of Asturias) (autonym: eonaviego, gallego-asturiano; Asturian: eonaviegu, gallego-asturianu; Galician: eonaviego, galego-asturiano) is a term used to refer a set of Romance dialects or falas whose linguistic dominion extends in the zone of Asturias between the Eo and Navia rivers (or more exactly Eo and Frexulfe rivers), and which have been variously classified as the north-eastern varieties of Galician, as a linguistic group of its own, or even (less often) as the westernmost varieties of Asturian.

The area where these dialects are spoken includes the Asturian municipalities of Boal, Castropol, Coaña, Eilao, El Franco, Grandas de Salime, Pezós, San Martín de Ozcos, Santalla de Ozcos, Santiso de Abres, Tapia de Casarego, Taramundi, A Veiga, Vilanova de Ozcos, and partially those of Navia, Ibias, Villaión, and Allande.

Other terms used include gallego-asturiano (the official term in Asturias, meaning 'Galician-Asturian language') a fala ('the speech', not to be confused with the Fala language of Extremadura) and Galego de Asturias ('Galician language of Asturias'). The term Eonaviego was first used by the linguist Xavier Frías Conde, and it was himself who translated it as Eonavian in English, Éonavien in French or eonavienc in Catalan. In 2007, the Academy of the Asturian Language accepted the denomination of Eonavian to refer to this Galician-Portuguese dialect.