Alexa, Karen, Chad...Yours could be next.
Edit: that may be an overestimate. Still one of the most popular names in the US, but a more official source (SS) suggests there are no single names which are shared by more than about 5M people.
You're telling me there are fewer than 5 million Michaels or Johns? I would have thought more.
Using standard US mortality data, Wolfram Alpha reports estimates of 3.853M and 3.26M for Michael and John respectively, currently alive in the US.[2][3]
[1]: https://www.ssa.gov/oact/babynames/decades/century.html