The Galatians (Ancient Greek: Γαλάται, romanized: Galátai; Latin: Galatae, Galati, Gallograeci; Greek: Γαλάτες, romanized: Galátes, lit.'Gauls') were a Celtic people dwelling in Galatia, a region of central Anatolia surrounding present-day Ankara, during the Hellenistic period.[1] They spoke the Galatian language, which was closely related to Gaulish, a contemporary Celtic language spoken in Gaul.[2][3]
The Galatians were descended from Celts who had invaded Greece in the 3rd century BC. The original settlers of Galatia came through Thrace under the leadership of Leogarios and Leonnorios c. 278 BC. They consisted mainly of three Gaulish tribes, the Tectosages, the Trocmii, and the Tolistobogii, but there were also other minor tribes. In 25 BC, Galatia became a province of the Roman Empire, with Ankara (Ancyra) as its capital.
In the 1st century AD, many Galatians were Christianized by Paul the Apostle's missionary activities. The Epistle to the Galatians by Paul the Apostle is addressed to Galatian Christian communities in Galatia and is preserved in the New Testament.
https://en.m.wikipedia.org/wiki/Galatians_(people)The chief proof, however, of the existence of Jews in Galatia is the fact that St. Paul sent thither a general epistle known as the "Epistle to the Galatians." There is a strong disagreement among scholars as regards the parts of Galatia where these correspondents of St. Paul lived.
https://www.jewishencyclopedia.com/articles/6468-galatia 
