Surname Gretarsson (Gretarsson 
) , globally, is a rare last name. The last name Gretarsson is habitual in Northern Europe, particularly Iceland, where it is a common surname, Lithuania, where it is a rare surname, and Norway. Not in comparison with a country's population, the name is most common in Iceland, Poland, and the United States.
| VARIANT | COUNTRY |
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| Gretarsson | Germany, Iceland, United States, Poland, Lithuania |
| andri a gretarsson chess player (b. 1969) |
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| kristjan h gretarsson researcher |
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| oddur gretarsson Icelandic handball player, IS (b. 1990) |
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| brynjar snaer gretarsson (b. 1997) |
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Mr, Borgthor, Brynjar, Kristin, Jacalyn, Throstur, Heather, Hjortur, Sigurdur, Hjalti, Sigurjon, Alistair, Kristinn, Kristjan, Kristjon, Gunnlaugur, Jonmundur, Virginia, Gudmundur, Sigsteinn, Gretar, Reynir, Birkir, Jon, Gary, Lisa, Erik, Emil, Omar, Andri, Arnar, Agust, Breki, Petur, Oddur, Mikael, Sindri, Sigfus, Sigþór, Stefan, Andres, Armann, Sveinbjorn, and Alistair Ingi