Wie trouwde met Марија Комнин (ћерка Цара Јована Ii)?

John Roger or Rogerios (Greek: Ιωάννης Ρογέριος), also known as John Dalassenos (Greek: Ιωάννης Δαλασσηνός), was a Byzantine aristocrat of Norman descent, son-in-law of Byzantine emperor John II Komnenos (r. 1118–1143) and Caesar. In 1143, he unsuccessfully conspired to seize the throne.