Noin-Ula burial site
Many immigrants lived in the Xiongnu pasturelands, but at first they did not mix with the Xiongnu. To be a Xiongnu, one had to be a member of a clan, born of Xiongnu parents. The newcomers were well off, but were outsiders, and could marry only among themselves, not the Xiongnu. Only later did they intermix, increase in numbers, even created a state that existed from 318 to 350 AD.
Turkic peoples
It has often been suggested that the Xiongnu, mentioned in Han Dynasty records, were Proto-Turkic speakers. Although little is known for certain about the Xiongnu language(s), it seems likely that at least a considerable part of Xiongnu tribes spoke a Turkic language. However, some scholars see a possible connection with the Iranian-speaking Sakas. Some scholars believe they were probably a confederation of various ethnic and linguistic groups. Genetics research in 2003 on skeletons from 2000 year old Xiongnu necropolis in Mongolia found some individuals with DNA sequences also present in some modern-day Turks, suggesting that a Turkish component had emerged in the Xiongnu tribe at the end of the Xiongnu period.