After doing genetic testing it has been revealed that all Jatars belong to the R1a haplogroup and this haplogroup has originated in Eurasia north of Black and the Caspian seas. 3000 years ago our ancestors were from the Kurgan culture. These people are believed to be the first speakers of the Indo-European language group. Descendants of these people are found in Slavic populations in Europe, India, and Central and Western Asia.
This is the migratory map of the haplogroups taken from familytreedna.com:

The Jatars are an offshoot of the R1a haplogroup which is basically east european or central asian in origin.
Sure, if we go back far enough we are all from Africa but the Jatars are the offspring of those who went northwards, settled in Central Asia or thereabouts and then travelled down into India. Because the presence of this haplogroup is found more commonly in the ydna (passed on through the male line) it is believed that these people did not enter India as a migratory group but were invaders. They have a mention in the Rig Veda which was written thousands of years ago and are called “Aryans” if you believe that theory. There is no evidence of these people being in India beyond the last one thousand or so years.
What is clear is that they lived on the Indo Gangetic plains about 15,000 years ago, and were Indo-Scynthians. A significant number of people from the western side of the Indian sub-continent, ie Sindhis, Gujaratis and Punjabis also share some of this Halplogroup. ThisĀ haplogroup is more common amongst the Brahmins of India, even found to some extent amongst South Indian Brahmins.