Family name Dettmann (Dettmann 
) , all around the world, is quite a common last name. The family name Dettmann is characteristic of Germany, where it is quite a rare surname, Australia, where it is a rare surname, and Brazil. In absolute terms, it is the most numerous in Germany, Brazil, and the United States.
| VARIANT | COUNTRY |
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| Dettmann | Germany, Australia, South Africa, Brazil, United States |
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ludwig dettmann German painter (1865-1944), DE (b. 1865) |
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hans eduard dettmann DE (b. 1891) |
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| ludwig dettmann DE (b. 1856) |
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| herbert stanley dettmann (1875-1940) headmaster (b. 1875) |
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| eduard johann karl dettmann (b. 1867) |
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| johann dettmann RU (b. 1870) |
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| fritz dettmann German politician (1880-1965), DE (b. 1880) |
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| julius dettmann German SS officer, DE (b. 1894) |
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| friedrich dettmann German politician and locksmith (1897-1970), DE (b. 1897) |
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| gerd dettmann German art historian, DE (b. 1897) |
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| edith dettmann German painter (1898-1987), DE (b. 1898) |
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lutz dettmann German writer, DE (b. 1961) |
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henrik dettmann Finnish basketball coach, FI (b. 1968) |
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| helmut dettmann (b. 1908) |
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| fritz dettmann German bricklayer and engineer, DE (b. 1921) |
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