Oyiradai (died 1425) was the Mongol Khan of the Northern Yuan Dynasty in Mongolia. Oyiradai ascended to the throne of Khagan in 1415 with the help of the Oirats after Delbeg Khan was killed by eastern Mongols led by Adai Khan or perished in a battle with the Ming Dynasty in the same year. His ascent to the throne was meant to legitimize the Oirats’ rule because he was a direct descendant of Ariq Böke.
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