Namesakes
Calixtus Caravario
(a.k.a. Callistus) (m) ?-1930 
Saints
Callistus
(m) ?-1003
Saints
Callixtus I
(a.k.a. Callistus) (m) ?-222
Bishops of Rome and the Popes 217-222
Saints
Callixtus II
(a.k.a. Callistus) (m) c. 1065-1124
Bishops of Rome and the Popes 1119-1124
Callixtus
(a.k.a. Callistus) (m) ?-1183
Bishops of Rome and the Popes 1168-1178
Callixtus III
(a.k.a. Callistus) (m) 1378-1458
Bishops of Rome and the Popes 1455-1458