Family name Coester (Coester 
) , in all the world, is a rare cognomen. The cognomen Coester is habitual in Western Europe, particularly Switzerland, where it is quite a rare surname, Germany, where it is a rare surname, and Netherlands. Measured by absolute frequency, the name is most common in Germany, the United States, and Switzerland.
| VARIANT | COUNTRY |
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| Coester | Switzerland, Netherlands, United States, France, Germany |
| karl ludwig emil coester DE (b. 1787) |
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| emil coester (b. 1787) |
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| otto coester DE (b. 1833) |
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| mathilde coester (b. 1847) |
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| friedrich coester DE (b. 1847) |
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| alfred coester (b. 1874) |
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| oskar coester German painter, DE (b. 1886) |
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oskar h.w. coester Brazilian entrepreneur and inventor, BR (b. 1938) |
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| karl coester (b. 1881) |
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| robert coester (b. 1882) |
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| friedrich von coester (b. 1888) |
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| elisabeth coester German painter (1900-1941), DE (b. 1900) |
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| otto coester German graphic designer, DE (b. 1902) |
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| fritz coester DE (b. 1893) |
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| christian-brandt coester German navy officer and world war II U-boat commander, PL (b. 1919) |
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