Commentaries:
Robertson's Word Pictures (NT)
Nymphas (Numfan). That is masculine, if autou (his) is genuine (D E K L) after kat oikon, but Numfa (feminine) if authv (her) is read (B 67). Aleph A C P read autwn (their), perhaps including adelfouv (brethren) and so locating this church (ekklhsia) in Laodicea. It was not till the third century that separate buildings were used for church worship. See Romans 16:5 for Prisca and Aquila. It is not possible to tell whether it is "her" or "his" house here.
Other Robertson's Word Pictures (NT) entries containing Colossians 4:15:
Romans 16:5
Philemon 1:2
2 John 1:11
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