Family name Níelsson (Níelsson 
) , around the globe, is a very rare last name. The cognomen Níelsson is characteristic of Northern Europe, particularly Iceland, where it is quite a rare surname.
| sveinn níelsson (b. 1801) |
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haraldur níelsson (b. 1868) |
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brynjar níelsson Icelandic politician, IS (b. 1960) |
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| árelíus níelsson (b. 1910) |
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| brynjar níelsson IS (b. 1960) |
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| ársæll níelsson actor |
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