Family name Brynhildur (Brynhildur 
) , worldwide, is an extremely rare last name. Much more prevalently, Brynhildur is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Brynhildur | Sweden, Norway, Iceland, United States, Brazil |
Inga, Einarsdóttir, Veigarsdottir, Olafsdottir, Þórðardóttir, Þorkelsdóttir, Magnusdottir, Sighvatsdottir, Sighvatsdóttir, Svavarsdóttir, Bjornsdottir, Kjartansdottir, Pétursdóttir, Ragnarsdóttir, Davidsdottir, Gunnarsdóttir, Guðmundsdóttir, Johannsdottir, Einarsdottir, Ingvarsdóttir, Ásgeirsdóttir, Þorgeirsdóttir, Jakobsdóttir, Sigurðardóttir, Gísladóttir, Björnsdóttir, Melot, Rogers, Larsdóttir, Skúladóttir, Sverris, Barðadóttir, Pálsdóttir, Grímsdóttir, Jónsdóttir, Egilson, Magnúsdóttir, Birgisdóttir, Bjartmarz, Guðjónsdóttir, Geirsdóttir, Jonsdottir, Scheving-Thorsteinsson, Sólveigardóttir, Sverrisdottir, Asgeirsdottir, Brynjúlfsdóttir, Bjarnadóttir, and Kristjánsdóttir