John IV. (Ducas), dethroned by Michael Paleologus, [304]
John V. (Paleologus), minority of, [325-8];
expels John Cantacuzenus, [329];
defeated by the Turks, [330];
later years of, [333]
John VI. (Paleologus), reign of, [339];
embraces Catholicism, [341]
John (Angelus), Emperor of Thessalonica, [300]