I was laughing at the Rowling-haters when that nonsense came up a few years ago. “Cho Chang” is a fairly common Chinese name. I met at least one, maybe two, people named that when I lived there. Can’t remember for sure now.
It’s fucking annoying how my fellow liberals will insist on telling you how the world is, even though they don’t know a goddamn thing about it. I’d be very hesitant to speak on behalf of another entire culture I didn’t know jack shit about. But many of them do it with laughable and predictable results.