Cognomen Kristjánsdóttir (Kristjánsdóttir 
) , in all the world, is a rare family name. The cognomen Kristjánsdóttir is habitual in Northern Europe, particularly Iceland, where it is a common surname, Denmark, where it is a rare surname, and Sweden.
| VARIANT | COUNTRY |
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| Kristjánsdóttir | Denmark, Norway, Sweden, Iceland, United Kingdom |
| jófríður kristjánsdóttir IS (b. 1888) |
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| sigurást kristjánsdóttir IS (b. 1891) |
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| þuríður kristjánsdóttir IS (b. 1891) |
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| kristbjörg kristjánsdóttir IS (b. 1897) |
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| guðrún kristjánsdóttir IS (b. 1899) |
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| margrét kristjánsdóttir IS (b. 1900) |
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| rannveig kristjánsdóttir IS (b. 1900) |
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| anna g. kristjánsdóttir IS (b. 1900) |
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| valgerður kristjánsdóttir IS (b. 1901) |
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| halldóra kristjánsdóttir IS (b. 1904) |
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| filippía kristjánsdóttir IS (b. 1905) |
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| kristín kristjánsdóttir Icelandic teacher, IS (b. 1917) |
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| elísabet kristjánsdóttir IS (b. 1909) |
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| hulda björg kristjánsdóttir IS (b. 1909) |
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| elín kristjánsdóttir IS (b. 1917) |
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Rut, Aníta, Agnes, Birna, Bára, Bóel, Karen, Katla, Klara, Rakel, Ragna, Rósa, Dóra, Greta, Linda, Lilja, Lydía, Lára, Jóna, Tinna, Nanna, Ellen, Svana, Sonja, Selma, Sigga, Eva, Sara, Alma, Anna, Anne, Arna, Agla, Lena, Lóa, Nana, Elín, Elva, Erna, Erla, Hrönn, Vera, Fjóla, Inga, Ása, Maria, Marin, Metta, Edda, and Embla