Cognomen Gíslason (Gíslason 
, Гисласон) , in the world, is a rare last name. The cognomen Gíslason is habitual in Northern Europe, particularly Iceland, where it is a common surname, Denmark, where it is a rare surname, and Norway, where it is a very rare surname.
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| Gíslason | United Kingdom, Norway, Spain, Denmark, Iceland |
| vigfús gíslason (b. 1608) |
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| ólafur gíslason Icelandic theologian, IS (b. 1691) |
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| magnús gíslason (b. 1704) |
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| oddur gíslason (b. 1740) |
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konráð gíslason Icelandic grammarian and philologist (1808-1891), IS (b. 1808) |
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þorsteinn gíslason Icelandic poet (1867-1938), IS (b. 1867) |
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| oddur gíslason (b. 1836) |
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| einar gíslason (b. 1853) |
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gylfi þ. gíslason Icelandic politician, IS (b. 1917) |
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| garðar gíslason (b. 1876) |
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atli gíslason Icelandic politician, IS (b. 1947) |
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| óskar gíslason Icelandic film director, IS (b. 1901) |
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alfreð gíslason Icelandic handball player, IS (b. 1959) |
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| jón gíslason Icelandic translator, IS (b. 1909) |
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| gunnar gíslason Icelandic priest, IS (b. 1914) |
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Jon, Ívar, Óskar, Ómar, Magnús, Sindri, Skúli, Sævar, Sæmundur, Sveinn, Svavar, Snorri, Arnór, Arnþór, Baldur, Birgir, Björn, Bjarni, Bjarki, Pétur, Pálmi, Ragnar, Ýmir, Ásdís, Árni, Valur, Uni, Alex, Aron, Atli, Axel, Karl, Rafn, Geir, Jens, Jón, Rúnar, Orri, Andri, Arnar, Kári, Páll, Goði, Gylfi, Einar, Eyþór, Eðvald, Helgi, Örn, and Gunnar