Adam Clarke on Romans 16:14

Salute Asyncritus, etc. - Who these were we know not. Hermas was probably the same to whom a work called the Shepherd is attributed; a work with this title is still extant, and may be found among the writings of the apostolical fathers. But it is in vain to look for identity of persons in similarity of names; for, among the Greeks and Romans at this time there were many persons who bore the same names mentioned in this chapter.