Family name Tómasson (Tómasson 
) , throughout the world, is a rare cognomen. The family name Tómasson is characteristic of Iceland, where it is quite a common surname, Sweden, where it is a rare surname, and the United States, where it is an extremely rare surname.
| tómas tómasson IS (b. 1783) |
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| þórður tómasson IS (b. 1871) |
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| helgi tómasson Icelandic physician (1896-1958), IS (b. 1896) |
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| tómas tómasson (b. 1888) |
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hermann jón tómasson Icelandic politician, IS (b. 1959) |
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| jens tómasson Icelandic geologist, IS (b. 1925) |
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| haukur sigurður tómasson Icelandic geologist (1932-2014), IS (b. 1932) |
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| helgi tómasson Icelandic ballet dancer, IS (b. 1942) |
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| magnús tómasson Icelandic sculptor (b. 1943) |
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| tómas a. tómasson icelandic politician (born 1949), IS (b. 1949) |
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| jónas tómasson (b. 1946) |
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| óskar pétur tómasson association football player (b. 1956) |
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| ísak tómasson icelandic basketball coach and player (b. 1964) |
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| björgvin tómasson IS (b. 1956) |
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| einar páll tómasson Icelandic association football player, IS (b. 1968) |
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Jón, Stefán, Brynjar, Róbert, Daníel, Jóhannes, Eiríkur, Hendrik, Valgeir, Ágúst, Ásgeir, Ísleifur, Sigurður, Benedikt, Brynjólfur, Kristinn, Kristján, Ríkarður, Guðmundur, Valdimar, Ólafur, Kristófer, Hrólfur, Haukur, Hans, Arnar, Kári, Páll, Einar, Egill, Oskar, Árni, Ísak, Óskar, Magnús, Bergur, Pétur, Ragnar, Gunnar, Guðni, Jónas, Tómas, Hannes, Heimir, and Hallgrímur