Namesakes
Roman and Byzantine Emperors:
1 emperor
Emperor Titus Aurelius Fulvus Boionius Arrius Antoninus (a.k.a. Antoninus) 138-161 
Saints:
5 saints
Saint Antoninus ?-186
Saint Antoninus ?-260
Saint Antoninus ?-660
Saint Antoninus of Sorrento ?-830
Saint Antonino of Florence (a.k.a. Antoninus) 1389-1459