Tarsus was the town where "Saul of Tarsus" grew up after being deported as a child, probably as a slave with his parents from Gishala (modern Jish) in the mountain of Upper Galilee.(See Jerome and his "Commentaria in Epistolum ad Philemon" and "Paul, his story", by Jerome Murphy-O'Connor, page 2)
I took this quote from the Wikipedia article on "Tarsus". This is news to me. Has anyone else ever heard of this background info before, and does anyone have knowledge of this supposed document by Jerome? I was unsuccessful in finding anything about it online.