Last name Proper (Proper 
, เหมาะสม 
, Пропер 
) , around the globe, is quite a rare family name. The cognomen Proper is characteristic of Netherlands, where it is quite a rare surname, the United States, where it is a rare surname, and Slovakia. In absolute terms, this name is the most popular in the United States, Netherlands, and Thailand. Very seldom, Proper is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Proper | Nigeria, United States, Canada, Israel, Netherlands |
| เหมาะสม | Thailand |
| Пропер | Kazakhstan, Russia, Ukraine, Belarus |
| erastus k. proper American politician – Minnesota -- "E.K." House 1868-69 (District 15), US (b. 1825) |
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| jan proper organ builder (b. 1853) |
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| yermiyahu proper Victim of the Holocaust, UA (b. 1865) |
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| zavil proper Victim of the Holocaust, PL (b. 1870) |
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| ester proper Victim of the Holocaust, PL (b. 1872) |
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| ida sedgwick proper 1873 - 1957 | American | Painter, US (b. 1873) |
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| samuel proper Victim of the Holocaust, UA (b. 1881) |
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| elza proper Victim of the Holocaust, PL (b. 1891) |
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| johannes wilhelmus franciscus cornelis proper ID (b. 1886) |
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| malka proper Victim of the Holocaust, PL (b. 1897) |
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| dora proper Victim of the Holocaust, LT (b. 1900) |
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| josef proper holocaust victim, b. 1901-06-30, CZ (b. 1901) |
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| avraham proper Victim of the Holocaust, PL (b. 1901) |
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| armin proper Victim of the Holocaust, PL (b. 1903) |
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| arman proper Victim of the Holocaust, PL (b. 1905) |
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