Oyiradai Khan

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Oyiradai Khan
Birth and death: Unknown1425¹
Family name: Clan Name (Obogh)
Borjigin
Khalkha Mongolian: Боржигин
Chinese: 孛兒只斤
Given name: Oyiradai
Chinese: 斡亦剌歹
Dates of reign: 14151425
Dynasty: Northern Yuan (北元)
Era name: None
Era dates: 14151425²
Temple name: None
Posthumous name:
(short) 
None
Posthumous name:
(full) 
None
General note: Dates given here are in the Julian calendar.
They are not in the proleptic Gregorian calendar.

Oyiradai Khan (? - 1425), was the Mongol Khan of the Northern Yuan Dynasty in Mongolia. Oyiradai Khan ascent to the throne of khan in 1415 with the help of Oirats after Delbeg Khan (Dalbag) was killed by eastern and central Mongol clans led by Adai Khan in the same year, to legitimize Oirats’ rule because he was a direct descendant of Ariq Böke. Oyiradai Khan’s reign only covers the western part of Mongol territory but this was expanded near his death: during his rule, with the help from Ming Dynasty, western Mongol clans headed by Oirats launched two significant campaigns in 1422 and 1423 respectively against Adai Khan controlling eastern and central Mongol territory, and both resulted in victory for Oirats. After Oyiradai Khan’s death in 1425, the in fights among Oirats and western Mongol clans left the throne of khan vacant for several years, and it was not until 1433 when Oirats finally crowned Tayisung Khan (Toghtoa Bukha or Toγtoγa Buqa) as the new khan. Meanwhile, in the east, Oirats’s rival eastern Mongol clans proclaimed Adai Khan as the Great Khan in 1425, which eventually resulted in half a decade of the simultaneous existence of two khans supported by opposing Mongol clans.

Oyiradai Khan
Died: 1425
Regnal titles
Preceded by
Delbeg Khan (Dalbag)
Khan of the Mongols
1415 - 1425
Succeeded by
Adai Khan
Titles in pretence
Preceded by
Delbeg Khan (Dalbag)
— TITULAR —
Emperor of Yuan Dynasty
1415-1425
Reason for succession failure:
Ming Dynasty overthrew the Yuan Dynasty in 1368
Succeeded by
Adai Khan
Yongle Emperor of Ming Dynasty wielded actual authority over China