Adoption makes it entirely possible for an Asian-presenting person to have a European first name _and_ surname and, frankly, is not something you should be asked about in an interview.
But it might be worth paying extra attention to any clues that they might not have lived in that place and have a falsified history.
As he said, "we should treat each individual with respect and assumption of good intent." But a decent proportion of people showing this particular characteristic will be engaging in employment fraud, and we shouldn't be blind to that signal.
There are people with issues like dyslexia and people who don't fit the education system and perform poorly.
I've met non-native speakers who have far better spelling, grammar and an enlarged vocabulary than people who have lived in my English-speaking country for their whole lives.