Globally, Matthildur (Matthildur 
) is a very rare feminine forename. The given name Matthildur is characteristic of Northern Europe, particularly Iceland, where it is quite a common female name.
| VARIANT | COUNTRY |
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| Matthildur | Iceland, Norway, United States |
| matthildur finnsdóttir IS (b. 1876) |
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| matthildur halldórsdóttir IS (b. 1886) |
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| matthildur björnsdóttir IS (b. 1888) |
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| matthildur kvaran matthíasson IS (b. 1889) |
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| matthildur gottsveinsdóttir IS (b. 1890) |
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| matthildur kjartansdóttir IS (b. 1891) |
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| matthildur guðmundsdóttir IS (b. 1905) |
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| matthildur jónsdóttir IS (b. 1910) |
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matthildur þorsteinsdóttir Paralympic sprinter, IS (b. 1997) |
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| matthildur jónsdóttir campbell (b. 1946) |
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| matthildur anna gísladóttir Icelandic pianist, IS (b. 1983) |
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| matthildur thórdardóttir Icelandic association football player, IS (b. 1993) |
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Bush, Þórarinsdóttir, Gunnarsdottir, Kristjánsdóttir, Guðmundsdóttir, Gunnarsdóttir, Stefánsdóttir, Matthiasdottir, Ingólfsdóttir, Einarsdóttir, Jóhannsdóttir, Gísladóttir, Róbertsdóttir, Sigurdardottir, Bjarnadottir, Bergþórsdóttir, Thorsdottir, Bjornson, Skaftadóttir, Ásmundardóttir, Jónsdóttir, Jansson, Pálsdóttir, Aradóttir, Skuladottir, Holst, Kelly, Björnsdóttir, and Kristjansdottir