9. Οὐρβανὸν. “A common slave name, found among the members of the (imperial) household,” S. H. The name of course tells us nothing as to nationality. He may have been a Jew or a Greek.
τὸν συνεργὸν ἡμῶν. Prob., as S. H., a general description of working in the same cause as S. Paul and his companions, not necessarily of personal fellowship; cf. Phm 1:1 only: elsewhere always μου (Rom 16:3; Rom 16:21; Php 2:25; Php 4:3; 2Co 8:23 (ἐμὸς); Phm 1:24).
Στάχυν. “Rare but found in the imperial household,” S. H.; cf. Witkowski, Ep. Priv., p. 73.