Family name Ágústa (Ágústa 
, Аугуста 
) , globally, is an extremely rare cognomen. Much more frequently, Ágústa is the forename as well as the last name.
Ósk, Grétarsdóttir, Gisladottir, Gísladóttir, Tryggvadóttir, Erlingsdóttir, Einarsdóttir, Ágústsdóttir, Þorsteinsdóttir, Ragnarsdóttir, Bjarnadóttir, Gunnarsdóttir, Guðmundsdóttir, Halldórsdóttir, Hilmarsdóttir, Valgeirsdóttir, Vilbergsdóttir, Ingimarsdóttir, Sigurðardóttir, Steinarsdóttir, Kristjánsdóttir, Gudmundsdóttir, Björnsdóttir, Sverrisdóttir, Þorbergsdóttir, Waage, Björk, Lárusdóttir, Oddsdóttir, Pálsdóttir, Gorrell, Jónsdóttir, Harðardóttir, Hauksdóttir, Hjartar, Magnúsdóttir, Sveinsdóttir, Arnardóttir, Birgisdóttir, Karlsdóttir, Guðjónsdóttir, Hjaltadóttir, Víðisdóttir, Árnadóttir, Óskarsdóttir, Ólafsdóttir, Kristmundsdóttir, and Thorbergsdóttir