Cognomen Gerður (Gerður 
) , worldwide, is an extremely rare surname. Much more prevalently, Gerður is the forename as well as the last name.
Eðvarsdóttir, Guðmundsdóttir, Gunnarsdóttir, Stefánsdóttir, Eggertsdóttir, Jóhannsdóttir, Jóhannesdóttir, Gústavsdóttir, Gísladóttir, Björnsdóttir, Ólafsdóttir, Hjaltadóttir, Tómasdóttir, Guðjónsdóttir, Guðnadóttir, Magnúsdóttir, Helgadóttir, Hauksdóttir, Harðardóttir, Jónsdóttir, Guðlaugs, Pálsdóttir, Sigurðardóttir, and Kristjánsdóttir