Surname Retzlaff (Retzlaff 
) , throughout the world, is quite a common family name. The surname Retzlaff is habitual in Germany, where it is quite a rare surname, the United States, where it is a rare surname, and Denmark. In absolute terms, this name is the most popular in Germany, the United States, and Brazil. Very seldom, Retzlaff is the forename as well as the last name.
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| Retzlaff | Poland, Brazil, United States, Germany, Canada |
| hans retzlaff PL (b. 1859) |
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| carl retzlaff DE (b. 1863) |
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ingeborg retzlaff German physician (1929-2004), DE (b. 1929) |
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| otto retzlaff (b. 1879) |
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| karl retzlaff German jurist, DE (b. 1890) |
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| werner retzlaff German architect, DE (b. 1890) |
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| erich retzlaff German photographer, DE (b. 1899) |
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| ernst retzlaff politician, PL (b. 1902) |
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| charley retzlaff American boxer, US (b. 1904) |
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| hans retzlaff DE (b. 1902) |
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christoph retzlaff German diplomat, DE (b. 1962) |
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| heinz gustav friedrich retzlaff PL (b. 1906) |
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| ernest w. retzlaff American neurophysicist, US (b. 1918) |
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| pete retzlaff American football player (1931-2020), US (b. 1931) |
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| manfred retzlaff DE (b. 1938) |
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