Family name Leenheer (Leenheer 
) , worldwide, is quite a rare cognomen. The cognomen Leenheer is habitual in Belgium, where it is quite a rare surname, Netherlands, and Czechia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Netherlands, Belgium, and the United States.
| VARIANT | COUNTRY |
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| Leenheer | Netherlands, Belgium, Czechia, France, United States |
| jan de leenheer (b. 1642) |
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| anton plappart von leenheer AT (b. 1780) |
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| august frh. plappart von leenheer AT (b. 1836) |
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| august freiherr von plappart von leenheer (b. 1842) |
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| corn. leenheer Dutch photographer (1869-1942), NL (b. 1869) |
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| gerrit leenheer Dutch photographer (1874-1940), NL (b. 1874) |
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| johannes leenheer NL (b. 1874) |
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| rocus leenheer Dutch photographer, NL (b. 1891) |
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| cornelis leenheer Dutch water polo player, NL (b. 1906) |
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| jacoba leenheer NL (b. 1916) |
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| simon leenheer NL (b. 1917) |
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| boudewijn leenheer NL (b. 1920) |
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| andré de leenheer (b. 1941) |
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| aad leenheer Dutch association football player, NL (b. 1962) |
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| daniël leenheer researcher ORCID ID = 0000-0001-8696-0317 |
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