All the brethren which are with me (hoi sun emoi pantes adelphoi). The same phrase in Phi 4:21 in distinction from the saints in Phi 4:22. Probably the small company of travelling companions.
Unto the churches of Galatia (tais ekklēsiais tēs Galatias). A circular letter therefore to all the churches in the province (both South Galatia and North Galatia if he really laboured there).