Bible dictionaries
Achaicus
What Bible dictionaries say about “Achaicus”, one article after the other.
International Standard Bible Encyclopedia (ISBE 1915)
a-ka'-i-kus (Achaikos, "belonging to Achaia"): A name honorably conferred upon L. Mummius, conqueror of Corinth and Achaia (compare CORINTH). Achaicus was one of the leaders of the Corinthian church (to be inferred from 1Co 16:15 ff) who, visiting Paul at Ephesus with Stephanas and Fortunatus, greatly relieved the Apostle's anxiety for the Corinthian church (compare 1Co 5:1 ff). Paul admonishes the members of the Cor church to submit to their authority (compare 1Th 5:12) and to acknowledge their work (1Co 16:15 ff).
International Standard Bible Encyclopedia — James Orr, general editor and contributors; CrossWire SWORD module ISBE 2.2
The article in ISBE 1915Smith’s Bible Dictionary
William Smith; revised by F. N. Peloubet and M. A. Peloubet; CrossWire SWORD module Smith 1.3
The article in Smith