Comments to this post provided genetic information that I did not find in my research. So I did a big update to the post. The update is at the original URL:https://richardarunachala.wordpress.com/2014/07/01/tamil-villages-the-ancient-spiritual-heart-of-tamil-nadu-part-1/
Please read it for better information, especially about the India origin of the Aryans. There is no evidence that they migrated into India.