Cognomen Þorvarðardóttir (Þorvarðardóttir 
) , in all the world, is a very rare last name. The surname Þorvarðardóttir is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Þorvarðardóttir | Iceland |
| kristrún þorvarðardóttir IS (b. 1873) |
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| jakobína þorvarðardóttir IS (b. 1885) |
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| kristjana þorvarðardóttir IS (b. 1887) |
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ólína þorvarðardóttir Icelandic politician, IS (b. 1958) |
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| halldóra jóhanna þorvarðardóttir IS (b. 1959) |
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Edda, Dóra, Elín, Thelma, Ingunn, Ólína, Jóhanna, Kristbjörg, and Ragnheiður