ACHAICUS ə kā’ ə kəs (̓Αχαϊκός, G939, belonging to Achaia). A respected Christian of Corinth. His name suggests he may have been a slave or ex-slave of the family of L. Mummius, conqueror of Achaia. He is mentioned only in 1 Corinthians 16:17 as the third member of a three man delegation coming to Paul in Ephesus with a letter from the Corinthian church (1 Cor 7:1). Some MSS also insert the three names of the delegation in 16:15. Their arrival refreshed Paul, giving him the needed direct contact with the church. They returned to Corinth, apparently taking with them 1 Corinthians, as the subscription in the TR claims.