Throughout the world, Ireneusz (Ireneusz 
, Irenaeus 
, Ириней 
) is a common male first name. The first name Ireneusz is characteristic of Poland, where it is quite a common boy's name, Ireland, where it is quite a rare male name, and Germany, where it is a rare boy's name. Not in comparison with a country's population, this name is the most popular in Poland, Germany, and the United Kingdom. More frequently, Ireneusz is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ireneusz | Germany, United Kingdom, Ireland, United States, Poland |
| Irenaeus | Germany, United Kingdom, Austria, Nigeria, United States |
| Ириней | Kazakhstan, Russia, Belarus, Bulgaria, Ukraine |
| Иренеуш | Russia, Belarus |
Ireneusz is also a name for the fictitious and mythical characters: Ireneusz Skalski and Иринеј , character in Deacon of the Church of the Mother of God.
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ireneusz kleofas ogiński (1808-1863), FR (b. 1808) |
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| ireneusz litawor-chreptowicz (b. 1775) |
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ireneusz załuski LT (b. 1835) |
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ireneusz wierzejewski Polish officer, PL (b. 1881) |
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ireneusz branowski Major of the Polish Army (1892-1936), PL (b. 1892) |
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ireneusz roszkowski Polish gynecologist, precursor of prenatal medicine, PL (b. 1909) |
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| ireneusz kukliński Polish officer (b. 1880) |
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ireneusz paliński Polish weightlifter (1932-2006), PL (b. 1932) |
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ireneusz pawlak Polish musicologist, PL (b. 1935) |
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ireneusz iredyński Polish playwright, PL (b. 1939) |
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ireneusz kocyłak Polish actor, PL (b. 1945) |
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| ireneusz plater-zyberk Polish actor, PL (b. 1896) |
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ireneusz krzemiński Polish sociologist, PL (b. 1949) |
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ireneusz mroczkowski Polish Catholic priest and theologist, PL (b. 1949) |
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ireneusz PL (b. 1939) |
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