Cognomen Hafstein (Hafstein 
) , all over the world, is a very rare surname. The family name Hafstein is habitual in Iceland, where it is quite a common surname, Canada, where it is a very rare surname, and Germany, where it is an extremely rare surname. Very seldom, Hafstein is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Hafstein | China, Iceland, Canada, Germany |
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hannes hafstein Icelandic politician (1861-1922), IS (b. 1861) |
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jóhann hafstein Icelandic politician (1915-1980), IS (b. 1915) |
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| jakob hafstein Icelandic singer, IS (b. 1914) |
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| stefán jón hafstein Icelandic politician, IS (b. 1955) |
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| níels hafstein (b. 1947) |
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| valdimar tr. hafstein Icelandic scholar, IS (b. 1972) |
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| daniel hafstein (b. 1970) |
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| sigurdur freyr marinósson hafstein Ph.D. Gerhard-Mercator-Universität - Gesamthochschule Duisburg 2002 |
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