Cognomen Lettau (ผักกาด 
, Lettau 
) , in all the world, is quite a rare surname. The surname Lettau is habitual in Germany, where it is quite a rare surname, Latvia, where it is a rare surname, and the United States. In absolute terms, it is the most numerous in Germany, the United States, and Canada.
| VARIANT | COUNTRY |
|---|---|
| ผักกาด | Thailand |
| Lettau | Australia, Germany, Canada, United States, Latvia |
| rudolf lettau DE (b. 1866) |
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| georg lettau botanist (1878-1951) (b. 1878) |
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| josef lettau DE (b. 1898) |
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| heinz lettau (b. 1909) |
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| reinhard lettau German writer, DE (b. 1929) |
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| herbert lettau (b. 1937) |
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| kevyn lettau Brazilian singer, BR (b. 1959) |
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| michael k. lettau economist (b. 1965) |
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| martin lettau economist (University of California-Berkeley) (b. 1966) |
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| antje iken lettau (b. 1966) |
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| marie lettau researcher (ORCID 0000-0003-2666-7033) |
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| marcus lettau researcher ORCID ID = 0000-0002-3824-9923 |
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| marcus lettau researcher |
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| andreas lettau |
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| heike lettau |
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