Around the globe, Ειρηναίος (Ειρηναίος 
) is a very rare male first name. The first name Ειρηναίος is habitual in Southern Europe, particularly Greece, where it is a rare male name.
| VARIANT | COUNTRY |
|---|---|
| Ειρηναίος | Greece |
|
ειρηναίος ασώπιος Greek writer and physician, GR (b. 1825) |
|
| ειρηναίος τσούραλης Greek actor, GR |
|