Identification with the author of The Shepherd
By an early tradition, this Hermas was identified with the author of The Shepherd (Greek: Poimen), an instructive Christian text built on a series of visions and parables attributed to revelations from an angel. The OCA synaxarion records this tradition directly, and some accounts further ascribe to him the related works titled The Church and The Ten Parables.
The identification is ancient but disputed. It was advanced by Origen and followed by Eusebius and Jerome, who took the author of The Shepherd to be the same Hermas greeted by Paul. Most modern scholars, however, reject this on chronological grounds: the language and theology of The Shepherd place its composition in the second century, and the Muratorian fragment (c. 170) instead names its author as the brother of Pope Pius I of Rome, whose pontificate fell around the mid-second century. The traditional liturgical commemoration preserves the older identification while these questions of authorship remain unsettled.