The six top individual scorers, who thereby win Putnam Fellowships—and who are, of course, way out in the far-right tail of the math-talent bell curve—are listed as:
Number 1 is a Thai name. He looks pale for a Thai, though, and I'm guessing he's ethnic Chinese. There's a big market-dominant Chinese minority in Thailand, mostly of the Chaozhou (a/k/a Teochew, Shantou, Minnan) group. On the Kaplan→Copland principle, they take Thai names.
There is endless argument about how well assimilated into Thai society the Thai-Chinese are. My own impression was that it's not quite as bad as "William" says here, but not a whole lot better. That, however, is based on a mere three months teaching English in Thailand 44 years ago.