Irenaeus (disambiguation)
Saint Irenaeus of Lugdunum was a Catholic bishop, theologian and early church father.
Irenaeus or similar may also refer to:
- Irenaeus , primate of the Orthodox Church in America
- Irenaeus, a first-century Greek grammarian from Alexandria
- Irenaeus , metropolitan bishop of Vienna and Austria of the Russian Orthodox Church and Soviet spy
- Irenaeus of Sirmium, bishop and martyr
- Irenäus Eibl-Eibesfeldt, Austrian ethnologist
- Patriarch Irenaios , patriarch of the Eastern Orthodox Patriarchate of Jerusalem