Someone's name + linkedin profile (almost always included) tends to give it away 90% of the time. Sometimes you don't know, sure, but usually you do. Just like gender.

We didn't ask, of course.

If you look at my picture on Linkedin, you would be able to guess my race. Heck, if you looked at my profile on Github which I actively link to, you would instantly know my race.

Because every sane person hiring Googles people's names?

People know. It's a collection of clues, starting by their name