Demus was a friend and co-worker of Paul. He worked with Paul while Paul was in Rome between A.D. 61-63. He is mentioned in the greetings sent by Paul in the book of Colossians and the book of Philemon. But in Paul's second letter to Timothy, Demus deserts Paul, as Paul writes "Try to join me soon, for Demus, enamored of the present world, deserted me and went to Thessalonica..." (2 Tim. 4:9-10).