John

John was the name of no fewer than 23 popes.
John I - Pope from 523 to 526, was canonised;
John II - Pope from 532 to 535;
John III - Pope from 560 to 578;
John IV - Pope from 640 to 642;
John V - Pope from 686 to 687;
John VI - Pope from 701 to 705;
John VII - Pope from 705 to 707;
John VIII - Pope from 872 to 882;
John IX - Pope from 898 to 900;
John X - Pope from 914 to 928;
John XI - Pope from 931 to 936;
John XII - Pope from 956 to 964 - was only 18 when elected, led a licentious life;
John XIII - Pope from 965 to 972;
John XIV - Pope from 984 to 985;
John XV - Pope in 985;
John XVI - Pope from 985 to 996;
John XVII - Pope in 1003;
John XVIII - Pope from 1003 to 1009;
John XIX - Pope from 1024 to 1033;
John XX - Anti-Pope from 1043 to 1046;
John XXI - Pope from 1276 to 1277;
John XXII - Pope from 1316 to 1334 - a learned man, a steadfast, and a courageous;

John XXIII (Antipope) - Pope in 1410, deposed in 1415 - was an able man, but an unscrupulous. He is generally referred to as Antipope.
John XXIII - Pope from 1958 to 1963.

Nearby pages
John Thomson, John Toland, John Tyler, John Tyndal, John Updike