Last name Gahr (غار 
, Гар 
, Gahr 
) , all over the world, is quite a rare cognomen. The cognomen Gahr is characteristic of Austria, where it is quite a rare surname, Germany, and Norway, where it is a rare surname. Measured by absolute frequency, the name is most common in Germany, the United States, and Austria. Very seldom, Gahr is the forename as well as the last name.
| VARIANT | COUNTRY |
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| غار | Syria, Yemen, Iraq, Palestinian Territory, Egypt |
| Гар | Ukraine, Russia, Azerbaijan, Kazakhstan |
| Gahr | Poland, United States, Austria, Canada, Germany |
| rosa gahr holocaust victim, b. 1856-03-09, AT (b. 1856) |
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| hans-josef gahr German politician, DE (b. 1889) |
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hermann gahr Austrian politician, AT (b. 1960) |
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| david gahr American photographer (1922-2008), US (b. 1922) |
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| viktor von gahr (b. 1915) |
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| michael gahr German actor and voice actor (1939-2010), DE (b. 1939) |
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| manfred gahr pediatrician (b. 1944) |
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| klaus gahr German association football player, DE (b. 1955) |
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| manfred gahr ornithologist and neurobiologist, DE (b. 1959) |
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| herbert gahr AT (b. 1951) |
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| julie gahr researcher |
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| larry gahr college basketball player (1975–1976) Idaho State |
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| matthias e. gahr DE (b. 1971) |
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| manfred gahr |
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| jörg gahr |
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