Family name Thorsteinsson (Thorsteinsson 
) , in all the world, is quite a rare last name. The last name Thorsteinsson is habitual in Iceland, where it is a common surname, Greenland, where it is quite a common surname, and Denmark, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Northern Europe, particularly Iceland, Denmark, and Norway.
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| Thorsteinsson | Denmark, Norway, Iceland, Greenland, United States |
Thorsteinsen, Thorsteinson, Thorstensen, Thorstenson, Thorstensson, Torstensen, Torstenson, Þorsteinsson, Þórsteinsson, and Тхорстеинссон
| skuli thorsteinsson Icelandic explorer, IS (b. 975) |
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bjarni thorsteinsson (b. 1781) |
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steingrímur thorsteinsson Poet and writer (1831-1913), IS (b. 1831) |
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| pétur j. thorsteinsson icelandic merchant (b. 1854) |
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| pétur j. thorsteinsson (b. 1845) |
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| gunhild thorsteinsson Icelandic photographer (1878-1948) (b. 1878) |
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| haraldur hamar thorsteinsson Icelandic writer, IS (b. 1892) |
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| samúel thorsteinsson Danish association football player (1893-1956), IS (b. 1893) |
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| gunnar thorsteinsson Icelandic association football player (1894-1921), IS (b. 1894) |
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| friðþjófur thorsteinsson Icelandic association football player (1895-1967), IS (b. 1895) |
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| pétur j. thorsteinsson Icelandic politician, IS (b. 1917) |
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| raymond thorsteinsson Canadian geologist, CA (b. 1921) |
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pól thorsteinsson Danish footballer, FO (b. 1973) |
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| jon thorsteinsson IS (b. 1924) |
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steinthór freyr thorsteinsson Icelandic association football player, IS (b. 1985) |
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