The family name later applied to Genghis Khan’s descendants was Borjigin.
Borjigin was the Mongol clan of Temüjin, who became Genghis Khan in 1206. The clan’s traditional ancestry was traced to Bodonchar Munkhag, while Genghis Khan belonged to its Kiyat branch through his father, Yesügei. His descendants became known as the Chinggisids, but they remained part of the wider Borjigin ruling lineage.
Borjigin rulers dominated the Mongol Empire and several successor states, including the Yuan dynasty in China, the Golden Horde, and the Ilkhanate. “Chinggisid” is therefore the more precise term for direct descendants of Genghis Khan, whereas “Borjigin” identifies the broader dynastic clan. The other options were separate Mongol or steppe peoples, not the family name associated with his ruling house.