Last name Pius (Pius 
, Pio 
, بيوس 
, along with others...) , throughout the world, is a widespread surname. The last name Pius is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is quite a common surname, Nigeria, and Cabo Verde (explore the name in all countries). Measured by absolute frequency, it is commonest in Nigeria, Tanzania, and Brazil. Also, Pius is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Pius | Nigeria, Philippines, Brazil, Kenya, Tanzania |
| Pio | Nigeria, Italy, Philippines, Brazil, Tanzania |
| بيوس | Iraq, Iran |
| Pío | Spain, Mexico, Philippines, Peru, Argentina |
| Пиус | Ukraine, Russia, Kazakhstan |
| Пий | Ukraine, Kyrgyzstan, Kazakhstan |
| פיוס | Israel |
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titus aelius hadrianus antoninus augustus pius Roman emperor (86-161) (r. 138–161), IT (b. 86) |
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| gaius pomponius pius politician (b. 50) |
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| publius coelius balbinus vibullius pius 2nd century Roman senator, consul and governor (b. 50) |
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| quintus planius sardus truttedius pius (b. 50) |
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| gaius pomponius pius (b. 50) |
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| lucius cestius pius latin rhetorician who flourished during the reign of Augustus (b. 100) |
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| lucius vinicius pius (b. 150) |
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| fulvius pius Roman consul 238 AD (b. 200) |
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karl pius, erzherzog von österreich Archduke of Austria (1909-1953), AT (b. 1909) |
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| mikhael k. pius Assyrian historian (b. 1927) |
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quintus caecilius metellus pius Ancient Roman consul, general and statesman. A leader of the Optimates |
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| miroslav pius SK (b. 1942) |
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| mujuzi pius Ugandan politician |
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| theophilus pius researcher (ORCID 0000-0002-5495-7743) |
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| gaius julius publilius pius tribune of the Cohors I Vangionum in the 3rd century |
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