Achaia
: a Roman province located in Greece along the south coast of the Gulf of Corinth
Achaicus
: a man who was sent from Corinth to Paul before Paul wrote 1 Corinthians.
Apollos
: a Jewish man from Alexandria who was taught by Aquila and Priscilla
Fortunatus
: a Corinthian Christian man
Stephanas
: a man who, with his family, were the first converts in Achaia and who Paul baptised