Looks like this year's winners are again co-champions and of Indian (South Asian) origin. Guessing from their names, one of them has a Karnataka heritage and the other an Andhra background.
Quoting from "National spelling bee ends in a tie for third consecutive year" (USA Today, 5/27/16):
For the third year in a row, the Scripps National Spelling Bee has ended with two champions.
Nihar Janga, 11, of Austin, Texas, and Jairam Hathwar, 13, of Painted Post, N.Y., were declared co-champions Thursday night after fighting to a draw during 39 rounds of competition.
“It was just insane,” Jairam* said as he and Nihar triumphantly hoisted the golden winner’s cup into the air.
“I’m just speechless,” Nihar said. “I’m only in the fifth grade.”
*The younger brother of 2014 co-champion, Sriram Hathwar.