Surname Níelsdóttir (Níelsdóttir 
) , in the entire world, is a very rare cognomen. The surname Níelsdóttir is characteristic of Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Níelsdóttir | Iceland |
| magdalena níelsdóttir IS (b. 1897) |
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| helga níelsdóttir IS (b. 1903) |
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| sigríður níelsdóttir IS (b. 1903) |
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| dagbjört níelsdóttir IS (b. 1906) |
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| kristín níelsdóttir IS (b. 1910) |
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| sigrídur níelsdóttir Icelandic musician, IS (b. 1930) |
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| bryndís arna níelsdóttir Icelandic association football player, IS |
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