I do not know whether Indo-Aryan and dravidian have a common origin. To be honest i am not expert on these things except sinhala which i know
so cant comment on that.
I am saying though Sinhala is categorized as Indo Aryan, there is a strong dravidian element in Sinhala which hints at dravidian origin of sinhala ppl. The ones who did such categorization were white ppl who knew sinhala and english. But ppl who know both sinhala and tamil say there is a strong dravidian element in Sinhala.
I get why you are confused. Even in this thread sinhalese are saying different things regarding sinhala language
Some of the sinhala ppl want to downplay dravidian component in SL like some in this thread.
However Sinhala is unique in that it is influenced by both sanskrit and dravidian alike. Imagine some dravidians from south India were joined by some North indians who had sanskrit based languages and joined with some dravidian natives, with constant pali language training for 2000+ years. The result is a language which is influenced by both. That is what sinhala is.
thanks for the infor. btwn it was not me who said vellalar were brought by dutch for tobacco plants. It was another one. I know vellalars were here before that.
i guess you support caste system