Baron Ioannes Atreides lived during Feyd I usurpation. He belonged to the House Atreides Pelops (perhaps descedant of Theseus Atreides). He was the father of Konstantinos Atreides When Paulos II Atreides and Demetrios IX Atreides tried to organize a resistance against Feyd and branded as traitors, Ioannes was executed for high treason.