Nikhil Ji,
I am not determined to take a predetermined position on the question of the identity of the people who call themselves and are called by others aed Jats. Finding the theories offered on the question by many well meaning and respected writwers unacceptable in view of my own studies over a number of years and vetted through discusions at various fora and the extensive and solid evidence coming forth I ventured to form tentative view on the issue,the initial formulations of which I posted in the form of a review (partial) of Shri Dahiya's book. Due to certain circumstances that review could not be completed.You may kindly note that I have shown my disagreements with Shri Dahiya on the basis of incontrovertible evidence which has been cited on the spot with references.
However, I have worked further and put my ideas on the issue in a book that i have recently published, namely 'Jat, The label And the People' Herein I have tried to show that the Label (caste name) 'Jat' and the people (who are called 'Jat' should be studiedly support and hold the view independently. I whole heartedly support and hold thwe view, as many amongst us do that the people are the truest successors (among many others known by different labels) of the vedic Aryans. If we prefer to stick to the views put forward by some writers in spite of the glaring fallacies we commit no blasphamy. The contrary would also be true. I suppose.
By the way you had raised the question of what Gupta stands for. Let me briefly say that it is not at least the same as the modern day connotation of a caste group i. e. the 'bania'. The 'Dharana' gotra of the Gupta kings ( though hinted at in one reference alone. and I accept it as crucial evidence) makes it quite clear. But giving the ancient people a later day caste label 'Jat'. If today's Dharana gotra jats claim ancestory from those ancient Dharana people no one can and should have objection. There may be some among the later day day Rajputs who might have Dharana gotra and may claim a similar ancestory. Who would object? After all there is something like shared ancestory. Don't we have large number of gotras over lapping among the modern day jats and Rajputs? Kindly ponder.
In the end ,I would request you to excuse me for my reluctance to agree with what i believe goes against solid evidence.