Surname Postmus (Postmus 
) , across the world, is a rare last name. The last name Postmus is characteristic of Netherlands, where it is quite a rare surname, Australia, where it is a rare surname, and Canada, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Netherlands, the United States, and Australia.
| VARIANT | COUNTRY |
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| Postmus | Australia, Germany, Netherlands, Canada, United States |
| johannes postmus South African banker, ZA (b. 1877) |
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| freerk postmus Dutch resistance fighter, NL (b. 1921) |
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| pieter edsge postmus university teacher at Leiden University |
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| pieter e postmus researcher |
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| iris postmus researcher |
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| douwe postmus researcher, ORCID id # 0000-0002-9458-7038 |
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| bill postmus US (b. 1971) |
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| f. postmus |
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| d. postmus |
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