Chizhishizhuhou Chanyu
The southern Xiongnu were a branch of the eastern Xiongnu that followed the rebellious pretender Huhanye and in 51-53 BC moved en masse within the Han borders under protection of Chinese. Since the times of Huhanye, the status of the southern Xiongnu was loyal allies of the Han Dynasty. The southern Xiongnu enjoyed material support of the old "heqin" treaty, and in return guarded the Chinese northern borders and participated in the Chinese external and internecine conflicts as long as the Chinese court respected their independence. However, when the Han imperial court attempted to appoint an ineligible for the crown Western Jükü-Prince Yufuluo from ineligible Right Wing as a Chanyu, instead of respecting the traditional election, the southern Xiongnu dissented and elected a lawful alternate Hyuibu Gudu-heu. Later they expelled Yufuluo, who had to seek safety in exile at the Han imperial court.
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.