Surname Kleff (Kleff 
) , in the entire world, is a rare family name. The cognomen Kleff is habitual in Germany, where it is a rare surname, the United States, where it is an extremely rare surname, and Canada. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Nigeria.
| VARIANT | COUNTRY |
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| Kleff | Canada, Argentina, Nigeria, United States, Germany |
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bernhard kleff German archivist (1876-1948), DE (b. 1876) |
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hubert kleff German politician, DE (b. 1948) |
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sanem kleff German author, TR (b. 1955) |
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| gustav christian ludwig kleff DE (b. 1900) |
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| wilhelm kleff DE (b. 1905) |
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| theodor kleff (b. 1917) |
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| wolfgang kleff German footballer, DE (b. 1946) |
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| michael kleff (b. 1952) |
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Mr, Alois, Kevin, Ralph, Donna, Doris, Laura, Joyce, Julie, Heinz, Horst, Frank, Franz, Felix, Willi, Marcus, Markus, Shelly, Sheila, Stefan, Alfred, Kathie, Susan, Pierre, Simon, Fawn, Ms, Max, Amy, Jan, Tim, Uwe, Marc, Anke, Kyle, Paul, Pete, Ralf, Rose, Rolf, Ruth, Dana, Lisa, Jana, John, Else, Hans, Marie, and Rainer