Nymphas (Numphan). That is masculine, if autou (his) is genuine (D E K L) after kat' oikon, but Numpha (feminine) if autēs (her) is read (B 67). Aleph A C P read autōn (their), perhaps including adelphous (brethren) and so locating this church (ekklēsia) in Laodicea. It was not till the third century that separate buildings were used for church worship. See note on Rom 16:5 for Prisca and Aquila. It is not possible to tell whether it is “her” or “his” house here.