A Christian at Troas, with whom Paul left his cloak (2 Timothy 4:13) on his last hurried journey previous to his second captivity and martyrdom at Rome. Bishop of Berytus in Thrace subsequently, according to Hippolytus. He must have been a trustworthy friend to have had Paul's "books" (on papyrus), and "especially" his "parchments" (perhaps containing some of his inspired epistles) committed to him.