Cognomen Kettmann (Kettmann 
) , throughout the world, is quite a rare surname. The last name Kettmann is habitual in Western Europe, particularly Luxembourg, where it is quite a rare surname, Germany, where it is a rare surname, and Netherlands. Measured by absolute frequency, the name is most common in Germany, the United States, and Netherlands.
| VARIANT | COUNTRY |
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| Kettmann | Netherlands, United States, Germany, Luxembourg, Australia |
| alfred heinz kettmann German painter (1912-2010), DE (b. 1912) |
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| gerhard kettmann German linguist, DE (b. 1928) |
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| theodor kettmann German priest, DE (b. 1938) |
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| siegfried kettmann (b. 1941) |
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| viktor kettmann (b. 1947) |
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| georg kettmann DE (b. 1954) |
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| otto kettmann DE (b. 1963) |
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| steve kettmann American sportswriter, US |
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| roselotte kettmann |
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