Irenaeus

Irenaeus was a martyr of Thessalonica, commemorated together with Peregrinus and with Irene the Virgin. The three appear both in the martyrology of Jerome and in the Roman Martyrology. The story of their martyrdom has several variants in the Latin manuscripts, and some scholars doubt that Irenaeus and Peregrinus suffered at Thessalonica, or identify Irene with other women martyrs of the same name. Yet most manuscripts and western hagiographical notes regard them as saints of Thessalonica.

According to these, they suffered in the time of Emperor Diocletian (284 to 305), because they refused to sacrifice to idols; they were put to death by fire and were called "glorious martyrs of Thessalonica in Macedonia". They are commemorated on 5 May (new style) and are venerated by the faithful, without synodal canonization.