Namesakes for CALLISTUS:
  Bishops of Rome and the Popes: 3 popes, 1 antipope
      Pope Callistus I (a.k.a. Calixtus)   217-222
      Pope Callistus II (a.k.a. Calixtus)   1119-1124
      Antipope Callistus   1168-1178
      Pope Callistus III (a.k.a. Calixtus)   1455-1458
  Saints: 4 saints
      Saint Callistus
      Saint Callistus
      Saint Callistus I
      Saint Callistus