Throughout the world, Arsenii (Арсений 
, Арсеній , Arsenii 
) is a common male first name. The first name Arsenii is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common male name, Russia, and Belarus, where it is quite a rare male name. In absolute terms, it most frequently occurs in Russia, Ukraine, and Kazakhstan. Very seldom, Arsenii is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Арсений | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Арсеній | Ukraine, Belarus |
| Arsenii | Romania, Russia, Italy, Moldova, Greece |
| Арсении | Kazakhstan, Russia |
| arsenii t. galimov researcher (ORCID 0000-0003-1766-7461) |
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| arsenii portnyagin researcher |
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| arsenii khitrov researcher |
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| arsenii rudich Dr. sc. ETH Zürich 2011 |
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| arsenii fedosyuk Ukrainian soldier of the Azov regiment of the National Guard of Ukraine, participant in the Russian-Ukrainian war |
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