Aquila and his wife Priscilla (or Prisca) were Jews from Pontus who settled in Rome, where they worked as tent-makers. When the Emperor Claudius expelled all Jews from Rome in 49-50, they moved to Corinth. (They may already have been Christians; at that time the Empire made no distinction between Christians and Jews.) In Corinth they hosted the Apostle Paul, who lived and worked with them for awhile (Acts 18:1-3). They worked diligently with the Apostle, traveled with him, and were considered worthy to bring Apollos (December 8) to a full knowledge of the Faith (Acts 18:26)
Priscilla and Aquila returned to Rome around 58, and later went to Ephesus; they were living there when St Paul asked his disciple Timothy, Bishop of Ephesus, to greet them (2 Tim. 4:19). It was probably in Ephesus that they were martyred by the pagans.