Cognomen Jernberg (Jernberg 
) , all over the world, is quite a rare last name. The last name Jernberg is habitual in Northern Europe, particularly Sweden, where it is quite a common surname, Norway, where it is quite a rare surname, and Finland. Measured by absolute frequency, it is commonest in Sweden, the United States, and Norway.
| VARIANT | COUNTRY |
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| Jernberg | Sweden, Norway, China, Finland, United States |
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olof august andreas jernberg Swedish painter of the Düsseldorf School (1826-1896), DE (b. 1826) |
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olof jernberg German painter (1855-1935), DE (b. 1855) |
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| emma charlotta jernberg actor (b. 1822) |
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| jacob jernberg Finnish merchant, FI (b. 1824) |
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| frans evald jernberg (b. 1833) |
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| per jernberg SE (b. 1852) |
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sten jernberg SE (b. 1915) |
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sixten jernberg Swedish cross-country skier, SE (b. 1929) |
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| gustaf jernberg Swedish violinist, SE (b. 1881) |
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| herbert jernberg Swedish composer, SE (b. 1911) |
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michael jernberg Swedish racing driver, SE (b. 1963) |
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| ann marshak jernberg born:1928|died:1993|; Jernberg, Ann Marshak; Jernberg, Ann M. (Ann Marshak), 1928-; Jernberg, Ann; Jernberg, Ann (Ann Marshak), 1928-1993; Jernberg, Ann, 1928-1993; Jernberg, Ann M. 1928-; Jernberg, Ann M (b. 1928) |
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sofia jernberg Swedish singer, SE (b. 1983) |
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| per gustaf jernberg Swedish musician, SE (b. 1949) |
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| ingemar jernberg Swedish pole vaulter, SE (b. 1950) |
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