Surname Michaëlis (Michaelis 
, Michaëlis 
) , in the world, is a common cognomen. The surname Michaëlis is characteristic of Germany, where it is quite a common surname, Panama, where it is quite a rare surname, and Switzerland. In absolute terms, it is commonest in Germany, the United States, and Canada. Very seldom, Michaëlis is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Michaelis | Germany, Switzerland, United States, Canada, France |
| Michaëlis | Germany, Belgium, Denmark, France, Netherlands |
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sébastien michaëlis French religious servant, FR (b. 1543) |
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gerrit jan michaëlis painter from the Northern Netherlands (1775-1857), NL (b. 1775) |
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| johann august tobias michaëlis (b. 1760) |
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carolina michaëlis German academic, PT (b. 1851) |
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| hendrik carel michaëlis (1818-1896) (b. 1818) |
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karin michaëlis Danish journalist and author, DK (b. 1872) |
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| wilhelm michaëlis DE (b. 1840) |
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lena michaëlis Dutch discus thrower, NL (b. 1905) |
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hans karel michaëlis Dutch mayor, NL (b. 1920) |
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| rudolf michaëlis born 1901; died 1964 (b. 1901) |
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| tao michaëlis Danish actor, IT (b. 1920) |
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fanny michaëlis FR (b. 1983) |
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| bo tao michaëlis Danish literary critic (b. 1948) |
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| patrick michaëlis French actor, FR (b. 1953) |
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| carl theodor michaëlis Dr. phil. Universität Berlin 1875 |
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