Kitto's Popular Cyclopedia of Biblial Literature
Acha´icus, a native of Achaia, and a follower of the apostle Paul. He, with Stephanus and Fortunatus, was the bearer of the 1st Epistle to the Corinthians, and was recommended by the apostle to their special respect (1 Corinthians 16:17).
Kitto, John, ed. Entry for 'Achaicus'. "Kitto's Popular Cyclopedia of Biblial Literature". https://www.studylight.org/encyclopedias/eng/kbe/a/achaicus.html.