Proper noun
Achaia
Alternative form of Achaea
Cities which once belonged in Arcadia include Alea (now in Argolis) and Amilos (now in Achaia). Source: Internet
But when Gallio was proconsul of Achaia, the Jews made a united attack on Paul and brought him before the tribunal, saying, “This man is persuading people to worship God contrary to the law.” Source: Internet
In 110 CE under Trajan it became a province in its own right, separate from Macedonia and Achaia. Source: Internet
… Peter indeed may have belonged to Judea; but what had Paul in common with the gentiles, Luke with Achaia, Andrew with Epirus, John with Ephesus, Thomas with India, Mark with Italy?” Source: Internet