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Why I regret using 23andMe: I gave up my DNA just to find out I’m British | Technology | The Guardian
(www.theguardian.com)
This is a most excellent place for technology news and articles.
This only tells you about your very recent ancestry, but go back enough generations are you are descended from everyone alive at the time who still has living decendants, just like everyone else.
We're all Ethiopian
All of us are neandthal too, and decendants of various ancient celebrities as well as all the forgotten commoners.
You are all individuals
No, he/she/they can't possibly be that many. I'm one too!