I've come across one BA with a Sahara, and I work with a Stormie. Other than that? Pffft. Again, this author has no clue what they're talking about.
How does one define an "American" name, anyway?
America is a melting-pot made up of many different ethnicities and languages. Seems silly to designate the most god-awful names you can think of as "Amercian".