Family name Rojahn (Rojahn 
) , around the world, is quite a rare surname. The family name Rojahn is habitual in Norway, where it is quite a rare surname, Germany, and Brazil, where it is a rare surname. In absolute terms, it is commonest in Germany, Brazil, and the United States.
| VARIANT | COUNTRY |
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| Rojahn | Australia, Germany, Norway, Brazil, United States |
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ferdinand august rojahn German musician, DE (b. 1822) |
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| birgitte cornelia rojahn NO (b. 1839) |
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| rudolf rojahn German farmer, DE (b. 1875) |
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| carl august rojahn German chemist and pharmacologist, DE (b. 1889) |
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| vigdis rojahn Norwegian illustrator (1902-1994) (b. 1902) |
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| ernst rojahn Norwegian chess player, NO (b. 1909) |
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øyvind rojahn Norwegian golfer (1971-) (b. 1971) |
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| angela rojahn (born 1954) (b. 1954) |
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| heike rojahn (born 1961) (b. 1961) |
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| rudolf rojahn American composer, US (b. 1980) |
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| walter rojahn Peerage person ID=414624 |
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| patrick rojahn researcher |
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| august rojahn |
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| astrid e rojahn |
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| astrid elisabeth rojahn |
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