Cognomen Postumus (Postumus 
, Postumo 
, Posthum ) , in the entire world, is a very rare surname. The last name Postumus is habitual in Netherlands, where it is a very rare surname, Germany, and South Africa, where it is an extremely rare surname. In absolute terms, this name is the most popular in Netherlands, Germany, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Postumus | Netherlands, South Africa, United States, Canada |
| Postumo | Germany, Brazil, Argentina |
| Posthum | Germany |
Post., Posthumous, and Postremus
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agrippa postumus youngest son of Marcus Vipsanius Agrippa and Julia the Elder, IT (b. 12) |
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| gaius vibius postumus Roman senator, suffect consul and proconsular governor of Asia during the reign of Augustus (b. 35) |
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| lucius maecius postumus Roman senator (b. 50) |
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| fabius postumus (b. 150) |
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postumus junior possible 3rd century Roman imperial usurper (b. 250) |
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| postumus cominius auruncus Roman consul in 501 and 493 BC (b. 600) |
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| poenius postumus 1st century AD Roman soldier and legion prefect |
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| marcus egnatius postumus Roman consul |
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| gaius julius postumus ancient Rome politician |
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| marcus curtius postumus Roman politician |
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| marcus flavius postumus |
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