Bishops Gerontius and John

This is a joint or composite entry covering two bishops named Gerontius and John, recorded together as recipients of four letters. They are otherwise little attested and are known chiefly as correspondents within these letter collections rather than as independently documented historical figures. The associated collections span the late antique Latin West (Cassiodorus, Ennodius of Pavia, Ruricius of Limoges, late 5th to mid 6th century) alongside the 4th-century Greek orator Libanius, so the entry likely conflates more than one set of correspondents; the names Gerontius and John were both common among bishops of this era. No specific sees, dates, or individual identifications can be assigned with confidence from the available data. The coordinates point to the Ravenna/Classe region of northeastern Italy, consistent with the Ostrogothic-era Italian milieu of Cassiodorus and Ennodius, but this placement is an inference and should be treated as approximate.