Eucarpia (Eukarpia), mentioned by Strabo (XII, 576) and several other geographers, was situated on a road from Dorylaeum to Eumenia, between the Dorylaeum-Acmonia and Dorylaeum-Synnada roads, probably at the modern Emin Hissar, in the vilayet of Brusa.
He was the younger son of Gaius Julius Severus (b. ca 25), a Nobleman from Akmonia at Galatia, and paternal grandson of Artemidoros of the Trocmi, a Nobleman at Galatia, Asia Minor (son of Amyntas, Tetrarch of the Trocmi, King of Galatia), and his wife a Princess of the Tectosagii (daughter of Amyntas, Tetrarch of the Tectosagii).