Cognomen Kortmann (Kortmann 
) , around the world, is quite a rare surname. The family name Kortmann is habitual in Germany, where it is quite a rare surname, Netherlands, where it is a rare surname, and Chile.
| VARIANT | COUNTRY |
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| Kortmann | Netherlands, Germany, Chile, United States, Brazil |
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constant kortmann Dutch politician, NL (b. 1908) |
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| johannes kortmann German politician (1889-1965), DE (b. 1889) |
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karin kortmann German politician, DE (b. 1959) |
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| ferdinand kortmann German entrepreneur, DE (b. 1913) |
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| brigitte kortmann German stage actress, DE (b. 1927) |
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barbara kortmann Flautist from Germany, DE (b. 1985) |
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| erhard kortmann (b. 1927) |
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| tijn kortmann Dutch legal scholar, NL (b. 1944) |
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| helmut kortmann German physician (b. 1947) |
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| yvo kortmann Dutch politician, NL (b. 1947) |
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| karl dieter kortmann (b. 1941) |
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| olaf kortmann German volleyball player, DE (b. 1955) |
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| bernd kortmann German author and linguist, DE (b. 1960) |
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| peter kortmann basketball player (1961-), DE (b. 1961) |
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| christian kortmann German journalist, DE (b. 1974) |
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