The Huns did not mix with north Indians. The Huns were defeated by the Indian ruler Yasodharman in the 6th centuryThe Sakas and Huns mixed with the local North Indian populations and became Indians only.
and by the Indian Emperor Harsha in the 7th century and were driven out of India.
The Huns were described as barbarians or Mlecchas by the Indian scholars and the ancient Indians thought that they would get polluted by the Huns. And it seems that the Huns or Hephtalites were the ancestors of the Afghan Abdali tribe.