Dear Valmiki , Very interesting reading about the Aryan invasion and subsequent domination over the Indian peninsula - however I do remember reading that the Dravidians who are the original inhabitants of the entire peninsula spoke Dravidian languages some of which even have links with Austro- aboriginal languages and Afro - languages like Kikuyu , etc However these Dravidians who were basically animists were driven South by the powerful Aryan conquerors.
Also some of the inhabitants to come to Goa were Gaud - Saraswats ( fish eating Brahmins ) from as far away as the East - I am certain you would throw some light on the above in your future articles which are very enlightening to those interested in History and pre- history. Cyril D'Souza