[klmadfejno]

The problem with Nguyen is that while among white people, it's an uncommon name, among other populations it's INCREDIBLY COMMON, which isn't common knowledge. I think this a pretty negligible example though. Nowhere near as egregious as wondering if people are related because they're just the same race.

Hierarchy I don't believe is the right term. The homogeniety of norms is what matter. White women have surely encountered microaggressions. Non-normative white men as well. Honestly everybody differs from the norm in some way. The magnitude and frequency are what make it matter.

Someone thinking your last name implies kinship is whatever. Someone thinking you're a secretary because you're a black woman when you're the CEO is a big big problem.