There are numerous theories about the origin of the Jats, ranging from their sudden appearance from Shiva's locks to their lineage in the Aryan race. Jats are commonly considered to be of Indo-Aryan stock in view of the similar ethnological, cultural, physical features, and common practices. Dr Natthan Singh writes that Jats were the pure Aryans and their original homeland was Sapta Sindhu. On the basis of historical facts the Jats are reported to be present in India from 3102 BC. They had to migrate from India on economic, social and political reasons for some period but they returned back to India. In the migration also they did not leave their language and cultural traditions. Due to this reason only Jats do not have linguistic or physical similarities with Huns and Scythians. This view is also supported by Thakur Deshraj who writes that on the basis of ethnological, physical, cultural and linguistic standards Jats are pure Aryans who inhabited the areas on the banks of Ganga-Yamuna or Sarswati-Sindhu during Vedic civilization.
Thakur Deshraj, Ram Lal Hala and Al-Biruni consider Jats to be the descendants of Krishna. Sir Herbert Risley declared the Rajput and the Jat to be the true representatives of the Vedic Aryans. Risley has mentioned in 1901 census report that as per their physique Jats are pure Aryans.
Jat states of the eighteenth and nineteenth centuries included Kuchesar ruled by the Dalal Jats, Gohad ruled by Rana Jats, and the Mursan state (the present-day Hathras district in Uttar Pradesh) ruled by the Thenua Jats. A recent ruler of this state was Raja Mahendra Pratap (1886–1979), who was popularly known as Aryan Peshwa. Jat rulers occupied and ruled from Gwalior Fort on several occasions:. Maharaja Suraj Mal captured Agra Fort on 12 June 1761 and it remained in the possession of Bharatpur rulers till 1774.
Maharaja Bhupinder Singh Sidhu of Patiala. Patiala and Nabha were two important Sikh states in Punjab, ruled by the Jat-Sikh people of the Siddhu clan.The Jind state in present-day Haryana was founded by the descendants of Phul Jat of Siddhu ancestry. These states were formed with the military assistance of the sixth Sikh guru, known as Guru Har Gobind. The rulers of Faridkot were Brar Jat Sikhs.