Namesakes
Callixtus I
(m) ?-222 
Bishops of Rome and the Popes 217-222
Saints
Callixtus II
(m) c. 1065-1124
Bishops of Rome and the Popes 1119-1124
Callixtus
(m) ?-1183
Bishops of Rome and the Popes 1168-1178
Callixtus III
(m) 1378-1458
Bishops of Rome and the Popes 1455-1458