QUOTE
According to the Chinese History books the Göktürks (Tujue people) also came from Xiongnu people... So Xiongnu people were Proto-Turks!
Actually, the Chinese sources are not in any agreement about the origins of the Gokturks. One of the two earliest sources, the
Sui Shu (completed in 636), says that the ancestors of the Gokturks "were mixed-breed Hu 雜胡 from Pingliang 平涼 (eastern Gansu)" who fled to the Rouran kaghanate in 430 to escape the attacking Northern Wei army, and then settled down in the Altai Mountains and became metal-workers. Now, 'Hu' is a very broad and vague term in Tang-period sources, because it could refer to any foreigner (or his descendants) from the north or west, including Sogdians, Indians, Arabs, Turks, Xiongnu, Xianbi, etc. And "mixed-breed Hu" is an even vaguer term that simply suggests the writer has no idea where these people came from.
Furthermore, the
Sui Shu continues with "but it is also said that (或云) their ancestors had a kingdom at the Western Sea". The Western Sea could be either the Aral Sea or the Caspian Sea - the Tang empire had no concrete knowledge of the geography in this area, so its use of such terms was quite imprecise. The version about the kingdom on the Western Sea basically goes that the kingdom was destroyed by its enemies and the whole population was exterminated, and only one boy was spared and abandoned with his limbs all cut off. A female wolf fed the boy and kept him alive, and later mated with him and became pregnant. The enemies of the kingdom came again and killed the boy, but the wolf escaped into a huge cave to the northwest of Turfan and gave birth to ten sons. The descendants of the ten sons (it's not explained where their wives came from) eventually left the cave, led by their chief Axianshe, and pledged allegiance to the Rouran kaghanate.
So the
Sui Shu already had two versions of the story, neither of which mentions the Xiongnu. But another source, the
Zhou Shu 《周書》, which was also completed in 636, has a variation to the wolf-and-boy story which starts by saying that the Turks were "probably a branch of the Xiongnu 蓋匈奴之別種". It does not mention the mixed-breed Hu story.
Then we come to the next source, the
Bei Shi (completed in 659). The
Bei Shi starts with the story of the boy and the wolf, but adds that the kingdom/tribe that was exterminated was originally to the west of the Western Sea, and (like
Zhou Shu) that it was "probably a branch of the Xiongnu 蓋匈奴之別種也". Next the text says "but it is also said that... (或云)", and repeats the story about the mixed-breed Hu of Pingliang. Finally, it adds a third version where "the ancestors of the Turks originated from the kingdom of Suo 索, to the north of the Xiongnu". This versions says that the Turks originated from Naduliushe, the eldest son of Yizhinishidu, and that Yizhinishidu was one of the seventy sons of the Suo kingdom's chieftain Apangbu, and that his mother was a wolf. Naduliushe had ten wives, and the most junior wife was from the Ashina family. His sons were all named after their mothers, so Lady Ashina's son was named Ashina. After Naduliushe's death, his sons decided to choose a leader based on who could jump the highest. Ashina was youngest but could jump the highest, so he became the leader and was given the title Axianshe.
Now we have three versions of the Turks' origin, one of which mentions the Xiongnu with a "probably".
Finally, 400 years later, the writer of the second official history of the Tang dynasty - the
Xin Tangshu (completed in 1060) - attempted to sort out all these conflicting versions and present an authorative statement on the origin of the Turks. But all he could come up with was this:
"The Ashina tribe of the Turks were probably a northern branch of the Xiongnu (蓋匈奴北部也). They lived to the north of the Altai Mountains, were vassals of the Rouran, and multiplied to great numbers".
The "probably" in the first sentence is very telling again. The truth is that the Tang historians had no idea where the Turks came from. They heard of some of the Turks' own origin myths, including those of the wolf and boy and of Yizhinishidu, Naduliushe, and Ashina/Axianshe, but none of these myths sounded believable or matched with what the earlier Chinese texts said about the peoples of the north. So the historians added their own theories about "mixed-breed Hu from Pingliang" and "probably a branch of the Xiongnu", neither of which had any evidence whatsoever.
You may not be familiar with ancient Chinese sources on the steppe nomads, but I can confirm that this sort of pure speculation about their origins was very common. Another example is Tang sources on the Tiele 鉄勒 tribes. It is well-attested in earlier sources that the Tiele were descended from the Gaoche 高車 or Dingling 丁零, who were originally from the Lake Baikal area and were conquered by the Xiongnu but always remained a separate people. But the Tang sources say that the Tiele "were descendants of the Xiongnu" (匈奴之苗裔也). This is entirely false and misleading, and no modern historian takes it seriously. I would suggest that we be equally skeptical about the claims that the ancestors of the Turks were "probably a branch of the Xiongnu".