Evarestus, the Fourth Bishop of the Church of Rome.
Church History (Historia Ecclesiastica) · Eusebius of Caesarea
EusHE 5.34.1
1. In the third year of the reign of the emperor mentioned above, Clement committed the episcopal government of the church of Rome to Evarestus, and departed this life after he had superintended the teaching of the divine word nine years in all.