Surname Kalthoff (Kalthoff 
) , globally, is quite a rare cognomen. The last name Kalthoff is habitual in Germany, where it is quite a rare surname, Mauritius, and Austria, where it is a rare surname. Measured by absolute frequency, the name is most common in Germany, the United States, and Austria.
| VARIANT | COUNTRY |
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| Kalthoff | Netherlands, Canada, United States, Germany, Austria |
| caspar kalthoff Dutch scientific instrument maker (b. 1606) |
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| caspar jasper kalthoff (b. 1628) |
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| matthias kalthoff Gunsmith (b. 1645) |
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| johann heinrich kalthoff DE (b. 1803) |
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| albert kalthoff theologian, DE (b. 1850) |
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| anna kalthoff (b. 1853) |
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| wilhelm kalthoff (b. 1901) |
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| hugo kalthoff DE (b. 1903) |
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| hildegard kalthoff (b. 1915) |
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| horst kalthoff German author (1926-2017), DE (b. 1926) |
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| edgar kalthoff (b. 1930) |
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| helmut kalthoff German association football manager, DE (b. 1948) |
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| dustin kalthoff Canadian male curler, CA (b. 1953) |
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| holger kalthoff (b. 1950) |
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| herbert kalthoff (b. 1957) |
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