Analysis of information sources in references of the Wikipedia article "List of ancient Iranian peoples" in English language version.
... the K'ang-chii who were perhaps the Sogdians of Iranian stock...
There is no consensus concerning the Hephthalite language, though most scholars seem to think that it was Iranian.
...it seems likely, the Wu-sun were an Indo-European, perhaps Iranian people...
Their royal tribes and kings (shan-yii) bore Iranian names and all the Hsiung-nu words noted by the Chinese can be explained from an Iranian language of Saka type. It is therefore clear that the majority of Hsiung-nu tribes spoke an Eastern Iranian language.
The origin of the Cimmerians is obscure. Linguistically they are usually regarded as Thracian or as Iranian, or at least to have had an Iranian ruling class.
... in the second half of the 2nd century bce the Xiongnu, at the height of their power, had expelled from their homeland in western Gansu (China) a people probably of Iranian stock, known to the Chinese as the Yuezhi and called Tokharians in Greek sources.
At the end of the 3rd century, there began in Chinese Turkistan a long migration of the Yuezhi, an Iranian people who invaded Bactria about 130 bc, putting an end to the Greco-Bactrian kingdom there. (In the 1st century bc they created the Kushān dynasty, whose rule extended from Afghanistan to the Ganges River and from Russian Turkistan to the estuary of the Indus.)
CHIONITES... a tribe of probable Iranian origin that was prominent in Bactria and Transoxania in late antiquity.
From the first millennium b.c., we have abundant historical, archaeological and linguistic sources for the location of the territory inhabited by the Iranian peoples. In this period the territory of the northern Iranians, they being equestrian nomads, extended over the whole zone of the steppes and the wooded steppes and even the semi-deserts from the Great Hungarian Plain to the Ordos region in northern China.
