Surname Bjarnason (Bjarnason 
, Бярнасон 
) , throughout the world, is quite a rare family name. The last name Bjarnason is characteristic of Iceland, where it is a widespread surname, Denmark, where it is quite a rare surname, and Canada. Not in comparison with a country's population, this name is the most popular in Iceland, Canada, and the United States. Much less frequently, Bjarnason is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Bjarnason | Iceland, Sweden, United States, Canada, Denmark |
| Бярнасон | Russia |
| þorkell bjarnason (b. 912) |
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| kolbeinn bjarnason (b. 1250) |
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| bjarni bjarnason Icelandic murderer (b. 1761) |
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| hannes bjarnason (b. 1777) |
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| jón bjarnason (b. 1791) |
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jóhann magnús bjarnason Icelandic writer, poet and teacher, IS (b. 1866) |
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ingibjörg h. bjarnason Icelandic politician, suffragist, schoolteacher and gymnast, IS (b. 1867) |
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ágúst h. bjarnason Icelandic philosopher, IS (b. 1875) |
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| jón bjarnason Icelandic priest (b. 1845) |
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brynjólfur bjarnason Icelandic politician, IS (b. 1898) |
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| þorkell bjarnason (b. 1839) |
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| lárus h. bjarnason Icelandic politician (1866-1934), IS (b. 1866) |
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| sighvatur bjarnason (b. 1859) |
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| þorleifur bjarnason (b. 1863) |
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| brynjólfur h bjarnason (b. 1865) |
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