Surname Hermannsson (Hermannsson 
) , worldwide, is a rare cognomen. The cognomen Hermannsson is habitual in Iceland, where it is a common surname, Greenland, where it is quite a common surname, and Latvia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Iceland, the United States, and Greenland.
| VARIANT | COUNTRY |
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| Hermannsson | Greenland, Sweden, United States, Denmark, Iceland |
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steingrímur hermannsson Prime Minister of Iceland (1928-2010), IS (b. 1928) |
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| halldór hermannsson IS (b. 1878) |
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| hermann hermannsson Icelandic association football player (1914-1975), IS (b. 1914) |
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| guðmundur hermannsson Icelandic athletics competitor (1925-2003), IS (b. 1925) |
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| sverrir hermannsson Icelandic politician, IS (b. 1930) |
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| björgvin hermannsson footballer, IS (b. 1938) |
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martin hermannsson Icelandic basketball player, IS (b. 1994) |
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| finnbogi hermannsson icelandic writer and politician, IS (b. 1945) |
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hjörtur hermannsson Icelandic association football player, IS (b. 1995) |
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| karl hermannsson association football player (b. 1945) |
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| dofri hermannsson Icelandic politician, IS (b. 1969) |
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| tomas hermannsson chess player (b. 1971) |
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| hermann reynir hermannsson M.S., civil engineering, University of Washington, 2013 |
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| ragnar hermannsson |
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| oskar hermannsson |
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Mr, Bryan, Páll, Runar, Dagur, Gulli, Gisli, Gigja, Lotte, Jakob, Jonas, Ellen, Elvar, Einar, Egill, Helgi, Hrund, Hlynur, Hjorvar, Freyr, Friã, Marion, Adolf, Arnar, Ariel, Andri, Ba, Ari, Gã, Jon, Tor, Arni, Aron, Adam, Bjã, Karl, Stefan, Pall, Guã, Grã, John, Jón, Thor, Hjã, Orri, Omar, Óli, Stine, Rafn, and Birgir