By this time the Iranian tribes were the majority in what later become the territory of Median kingdom and also the west of Media proper.

But the Iranian tribes to the north, especially the Cadusii, were always troublesome; many abortive expeditions of the later kings against them are mentioned.

Another explanation is that the name originated from the Iranian Alanic tribe of Jassi.

Cyrus the Great united several ancient Iranian tribes to create an empire.

As described below, the original Turanians are an Iranian tribe of the Avestan age.

Iranian tribes such as the Massagetae were believed to be the originator of the class of heavy cavalry known as cataphract.

Some scholars believe that polo originated among the Iranian tribes sometime before the 6th century BC.

Early precursors to some of the Pashtuns may have been old Iranian tribes that spread throughout the eastern Iranian plateau.

In this case the Sigynnae would be a Thracian rather than an Iranian tribe.

Others scholars say that the Iranian tribes simply intermixed with the Elamite peoples living in the plateau.