Ioannis married Irini Dukaina Laskarina, [PRINCESS OF BYZ about 1212 in Of Nicaea, Bursa, Turkey. Irini (daughter of Theodoros I, Emperor Byzantine Empire, AND NICEA and Anna Komnene Angelina, Byzantine Empire) was born about 1199 in Of, Nicaea, Bursa, Turkey; died after 1239. [Group Sheet] [Family Chart]