All the brethren which are with me (ο συν εμο παντες αδελφο). The same phrase in Philippians 4:21 in distinction from the saints in verse Galatians 1:22. Probably the small company of travelling companions.

Unto the churches of Galatia (ταις εκκλησιαις της Γαλατιας). A circular letter therefore to all the churches in the province (both South Galatia and North Galatia if he really laboured there).