Family name Kristjánsson (Kristjánsson 
) , all around the world, is a rare cognomen. The surname Kristjánsson is characteristic of Northern Europe, particularly Iceland, where it is a common surname, Denmark, where it is a rare surname, and Sweden.
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| Kristjánsson | Denmark, Norway, Sweden, Iceland, Italy |
Christianson, Christiansson, Christjansen, Kristiansen, Kristiansson, and Kristjansson
| kristján kristjánsson Icelandic politician, IS (b. 1806) |
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| björn kristjánsson Icelandic politician, IS (b. 1858) |
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lúðvík kristjánsson b. 1911, IS (b. 1911) |
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| magnús kristjánsson Icelandic politician, IS (b. 1862) |
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jón halldór kristjánsson Icelandic politician, IS (b. 1942) |
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| axel kristjánsson Icelandic athlete and merchant (b. 1892) |
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guðjón a. kristjánsson Icelandic politician (1944-2018), IS (b. 1944) |
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| árni kristjánsson painter (1906-2003), IS (b. 1906) |
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| sverrir kristjánsson Icelandic historian (1908-1976), IS (b. 1908) |
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jón egill kristjánsson professor (1960-2016), IS (b. 1960) |
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| einar kristjánsson Icelandic opera singer (1910–1966), IS (b. 1910) |
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| einar kristjánsson Icelandic writer and farmer (1911–1996), IS (b. 1911) |
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| hermína sigurgeirsdóttir kristjánsson IS (b. 1904) |
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| jón kristjánsson Icelandic cross-country skier (1920-1996), IS (b. 1920) |
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| oddgeir kristjánsson (b. 1911) |
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Ari, Jóel, Tanni, Tóti, Elmar, Einar, Egill, Eyþór, Helle, Helgi, Hlynur, Hlér, Oddur, Árni, Ísak, Óskar, Ómar, Úlfur, Þröstur, Magnus, Magnús, Sindri, Jakob, Lárus, Dýri, Dagur, Már, Alex, Aron, Atli, Axel, Karl, Logi, Jón, Tina, Emil, Steinn, Hans, Uffe, Óli, Sæþór, Andri, Arnar, Adolf, Aaron, Kári, Knútur, Páll, Orri, and Sturla