At Christmas my Indian husband took a DNA test with Ancestry.com. He just got the results. They weren't too surprising. It said his DNA was 78% South Asia and 14% Asia East. This is not uncommon for Indians in the northern states, since they are more likely to intermarry with other east asian groups. Many of the indentured laborers sent to Fiji were from Uttar Pradesh (a state in the north), his ancestors included (the ones we have found so far anyway).
What was a little surprising is that his DNA also contained 7% Melanesian and 1% Polynesian. So, one of his ggg-grandparents might have been Fijian, which we had never heard before. But, since at least 2 of his gg-grandparents were born in Fiji, although they have Indian names, it is possible that one was only half Indian. Time to do a little more climbing in the family tree.