Regarding Jat Federation, Devasanhita and Central Asian
Regarding above queries Kindly go through Bhim Singh Dahiya's book Jats the Ancient Rulers. We have on Jatland at -
http://www.jatland.com/home/Jats_the_Ancient_Rulers_(A_clan_study)/The_Jats
I reproduce relavant content from the book:
Page - 18:
In all these ideas, that of the Ashtadhyayi grammar seems to be nearest to acceptable truth. This is supported by the fact that almost all these tribes (scattered forces) were professional warriors, and many of them were given the epithet of Vratya, i.e. foreigners. Whatever the origin of the word, there was definitely a
Jat federation of ruling clans, during the time of Panini, Patanjali, etc. That is why, practically all the ancient Indian ruling families were from this race. The Mandas, Mauryas (Mores), the Pauras (Pors), the Kangs, the Variks, the Balhara, the Kasvans the Dharans, etc. were all from this
Jat federation. When the Puranas say that there were seven Abhiras, (Ahirs), ten Gardhabas (Khars), sixteen or eighteen Saka (Kangs), fourteen Tusharas (Tukhars or Tusirs), thirteen Mandas, eleven Maunas (Maans) and eleven Puras (Pors)all ruling India for about 1,300 years, they are merely mentioning the various Jat clans.
Devasamhita - But something must have happened in the 6th or 7th century A.D., during the course of the revival of the orthodox Brahmanism, which made these people persona non grata with the new orthodoxy. That is why, when the Puranas were revised, their historical details and even their names were removed therefrom. It is perhaps to this state of affairs that Devasamhita refers, when it records that, "nobody has published the truth about the origin and activities of the Jat race.
These Jats are most powerful, extremely brave and fierce fighters. These people are like the gods in their firm vows; and among all the Kshatriyas, these Jats were the first rulers of the earth. These people were born from the daughters of Daksha Prajapati. Their history is extremely chequered and astonishing. Their brilliant past destroys the false pride of the Brahmanas and the Devas. That is why the Puranas have kept their history secret or hidden."
Page - 22: Like almost all the clan names the word Jat means a "king" or "supreme leader". In Unādivṛitti, Hemachandra says that the word Jat means king. This was so because the
Jats were the first rulers in the vast central Asian plains as per Deva-Samhita.