Cognomen Fahlgren (Fahlgren 
) , globally, is quite a rare family name. The family name Fahlgren is habitual in Northern Europe, particularly Sweden, where it is quite a rare surname, Finland, where it is a rare surname, and Denmark. Not in comparison with a country's population, the name is most common in Sweden, the United States, and Afghanistan.
| VARIANT | COUNTRY |
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| Fahlgren | Canada, Sweden, Finland, United States, Afghanistan |
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carl august fahlgren Swedish painter (1819-1905), SE (b. 1819) |
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| johan jacob fahlgren Swedish actor, SE (b. 1786) |
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| arvid fahlgren actor (b. 1790) |
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| johan jakob fahlgren (b. 1785) |
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ludvig georg fahlgren actor (b. 1852) |
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| k. hj. fahlgren SE (b. 1900) |
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| siv fahlgren SE (b. 1949) |
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| margaretha fahlgren SE (b. 1952) |
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| sune fahlgren SE (b. 1952) |
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| martha k fahlgren researcher |
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| noah fahlgren researcher |
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| anna fahlgren researcher |
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| patrik fahlgren Swedish handball player, SE (b. 1985) |
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Mr, Seth, Sven, Ante, Anna, Anne, Adam, Carl, Cade, Bart, Brad, Bjã, Kyle, Paul, Pär, Rolf, Reed, Russ, Dana, Dave, Gail, Greg, Sune, Sara, Mike, Mona, Ms, Sue, Pia, Ray, Deb, Liv, Jan, Joe, Jeb, Jim, Glen, Ted, Eli, Eva, Hã, Ulf, Ute, Mari, Mary, Mark, Mats, Maja, Tim, and Gwen