Family name Kaack (凯克 
, Kaack 
) , in the entire world, is quite a rare surname. The family name Kaack is characteristic of Denmark, where it is a rare surname, Germany, and the Democratic Republic of the Congo. Not in comparison with a country's population, it most frequently occurs in Germany, the Democratic Republic of the Congo, and the United States. Much less frequently, Kaack is the forename as well as the last name.
| VARIANT | COUNTRY |
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| 凯克 | China |
| Kaack | Germany, Denmark, Italy, United States, Democratic Republic of the Congo |
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heino kaack German political scientist and university teacher (1940–1998), DE (b. 1940) |
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sabine kaack German actress (1959-), DE (b. 1959) |
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ulf kaack German non-fiction writer and journalist, DE (b. 1964) |
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| hans-georg kaack (1932-2008) (b. 1932) |
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| peter kaack German footballer, DE (b. 1943) |
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| helga kaack badminton player, DE (b. 1959) |
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| jan christian kaack German military personnel, DE (b. 1962) |
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| lars kaack badminton player (b. 1963) |
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| jürgen kaack (b. 1955) |
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| lynn h kaack researcher |
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| gustav kaack |
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Mr, Liza, Lynn, John, Joan, Tina, Edna, Egle, Harm, Hans, Lisa, Inga, Maria, Mario, Marta, Marco, Sally, Signe, Susan, Carey, Clara, Ingo, Leon, Rita, Rene, Ms, Aj, Cia, Rob, Lee, Jan, Jay, Tom, Eva, Ole, Ulf, Mary, Mads, Sven, Anne, Adam, Carl, Bill, Karl, Paul, Rolf, Brian, and Birte