Dei Sechen (, ) was the chief of Khonggirat tribe's Bosqur () clan in

12th Twelfth can mean: *The Twelfth Amendment to the United States Constitution *The Twelfth, a Protestant celebration originating in Ireland In mathematics: * 12th, an ordinal number; as in the item in an order twelve places from the beginning, follo ...

– 13th centuries. His daughter

Börte Börte Üjin (; Mongolian: ), better known as Börte (), was the first wife of Temüjin, who became Genghis Khan, the founder of the Mongol Empire. Börte became the head of the first Court of Genghis Khan, and Grand Empress of his Empire. S ...

was the first and principal wife of

Genghis Khan Genghis Khan (born Temüjin; August 1227), also known as Chinggis Khan, was the founder and first khan (title), khan of the Mongol Empire. After spending most of his life uniting the Mongols, Mongol tribes, he launched Mongol invasions and ...

. According to ''

The Secret History of the Mongols The ''Secret History of the Mongols'' is the oldest surviving literary work in the Mongolic languages. Written for the Borjigin, Mongol royal family some time after the death of Genghis Khan in 1227, it recounts his life and conquests, and parti ...

'' Temujin was betrothed to Börte when he was 9 years old by

Yesugei Yesükhei () or Yesugei Baghatur ( Traditional Mongolian: ; Modern Mongolian: Есүхэй баатар, ''Yesukhei baatar'', ) (b. 1134 – d. 1171) was a major chief of the Khamag Mongol confederation and the father of Temüjin, who later be ...

and Dei, when Yesugei was looking for a bride for his son. Yesugei put his son in care of Dei Sechen and returned to his tribe, only to be poisoned on the road during a lunch by Tatars. However, according to Rashid al-Din, Dei Sechen wasn't happy with bethothal, it was his son Anchen (按陳) who facilitated the process. Japanese researcher Mako Fujii argued that Dei Sechen was involved in Yesugei's death. Later, when Temujin grew up, he still married his betrothed Börte. Part of her dowry was a luxurious black marten, which Temujin later presented to

Toghrul Toghrul ( ''Tooril han''; ), also known as Wang Khan or Ong Khan ( ''Wan han''; ; died 1203), was a Khan (title), khan of the Keraites. He was the blood brother (anda (Mongol), anda) of the Mongol chief Yesugei and served as an important early ...

, thus enlisting the support of the

Keraites The Keraites (also ''Kerait, Kereit, Khereid'', Kazakh: керейт; Kyrgyz: керей; Mongolian: Хэрэйд; Nogai: Кереит; Uzbek: ''Kerait''; Chinese: 克烈) were one of the five dominant Turco-Mongol tribal confederations ...

Descendants

He had a spouse named Chotan who bore his sons Anchen and Qogu and his daughter Börte. His descendants married into ruling

Borjigin A Borjigin is a member of the Mongol sub-clan that started with Bodonchar Munkhag of the Kiyat clan. Yesugei's descendants were thus said to be Kiyat-Borjigin. The senior Borjigids provided ruling princes for Mongolia and Inner Mongolia u ...

family, producing imperial son-in-laws and empresses.{{Cite journal , last=Landa , first=Ishayahu , date=2020-01-02 , title=“Loyal and Martial” until the End: The Qonggirad Princes of Lu 鲁 in Yuan Political Architecture , url=https://www.tandfonline.com/doi/full/10.1080/02549948.2020.1748299 , journal=Monumenta Serica , language=en , volume=68 , issue=1 , pages=137–167 , doi=10.1080/02549948.2020.1748299 , issn=0254-9948, url-access=subscription

References

Generals of the Mongol Empire 13th-century Mongols