This letter is not just for Philemon, it is also for his family and the church that met in their home.
Apphia was probably Philemon’s wife.
our fellow soldier: This refers to a servant of Christ who is in a spiritual battle and must be ready to fight against challenges (Ephesians 6:10–17).
Archippus was probably Philemon’s son (also mentioned in Colossians 4:17).
the church that meets in your house: This confirms that some early Christians would gather in private homes for worship (see also Romans 16:5; 1 Corinthians 16:19; Colossians 4:15).