According to The Secret History of the Mongols, their 11th generation descendant Dobu Mergen's widow Alan Gua the Fair was impregnated by a ray of light.
[10] According to Rashid-al-Din Hamadani, many of the older Mongolian clans were founded by members of the Borjigin—Barlas, Urud, Manghud, Taichiut, Chonos, Kiyat, etc.
By the unification of the Mongols in 1206, virtually all of Temujin's uncles and first cousins had died, and from then on only the descendants of Yesugei Baghatur, his brother Daritai, and nephew Onggur formed the Borjigid.
Established by marriage partners of Genghisids, these included the Suldus Chupanids, Jalayirids in the Middle East, the Barulas dynasties in Chagatai Khanate and India, the Manghud and Onggirat dynasties in the Golden Horde and Central Asia, and the Oirats in western Mongolia.
In Mongolia, the Kublaids reigned as Khagan of the Mongols, however, descendants of Ögedei and Ariq Böke usurped the throne briefly.
The Qing dynasty respected the Borjigin family and the early emperors married the Hasarid Borjigids of the Khorchin.
[17] Joseph Stalin's associates executed some 30,000 Mongols including Borjigin nobles in a series of campaigns against their culture and religion.
[18] Clan association has lost its practical relevance in the 20th century, but is still considered a matter of honour and pride by many Mongolians.
Because of that, a disproportionate number of families registered the most prestigious clan name Borjigin, many of them without historic justification.
[12] The Inner Mongolian Borjigin Taijis took the surname Bao (鲍, from Borjigid) and in Ordos Qi (奇, Qiyat).
A genetic research has proposed that as many as 16 million men from populations as far apart as Hazaras in the West and Hezhe people to the east may have Borjigid-Kiyad ancestry.
His grandson, Kublai Khan, after defeating his younger brother and rival claimant to the throne Ariq Böke, founded the Yuan dynasty of China in 1271.
The last khan Ligden died in 1634 and his son Ejei Khongor submitted himself to Hong Taiji the next year, ending the Northern Yuan regime.