Erketü Qatun

Erketü Qatun
Mistress of Loyalty and Obedience
Holder of the seal of the Prince of Loyalty and Obedience
Bornc. 1551
Died24 June 1612(1612-06-24) (aged 61)
Noble familyBorjigin
Spouse(s)Altan Khan
Sengge
Curüke
Busuytu
OccupationRegent of the Tümed

Erketü Qatun (Mongolian:ᠡᠷᠬᠡᠲᠦ
ᠬᠠᠳᠤᠨ
; meaning Powerful Queen) (c. 1551–1612), also referred to as the Third Lady or Sanniangzi (Chinese: 三娘子), was an influential member of the Borjigin clan in the late 16th century and early 17th century. Her real name is unknown, only being remembered by a title bestowed upon her. She was the wife of four subsequent leaders of the Tümed, and her pro-Ming dynasty views kept the longest peace between the two competing powers.