Eutherius, governor of Armenia

Eutherius is known as the recipient of several letters from the Antiochene rhetor Libanius in the mid-fourth century AD, in which he is addressed as governor of Armenia. The name was common in the period, so he should be kept distinct from the famous eunuch Eutherius, the grand chamberlain (praepositus sacri cubiculi) of Constantius II and Julian praised by Ammianus Marcellinus. Beyond his appearance in Libanius's correspondence he is otherwise little attested; he is best understood as a provincial governor of the eastern Roman empire of the 350s-360s whose dealings with Libanius (recommendations, favors, and the courtesies of the educated official class) place him within the Antiochene letter-writer's wide network of administrators. Specific biographical details such as exact dates of office cannot be established with confidence from the surviving evidence.