Zeon Zum Deikun (ジオン・ズム・ダイクン Jion Zumu Daikun?) is a character from the Mobile Suit Gundam: The Origin and its OVA adaptation. He was chairman of the Autonomous Republic of Munzo of Side 3, leading the Zeon Party which advocated indpendence from the Earth Federation.
The cause of death, inferred by his aide Jimba Ral, was "myocardial infarction caused by poison formulated from aconite." However, author Yoshikazu Yasuhiko states that Deikun may have died from overwork. It is revealed further in the story that Deikun was extremely exhausted in both body and mind on the eve of his death, based on recollection of his mistress Astraia.