Famous Names

Have you ever heard of any of these famous names?

Woolworth
Wrigley
Edison
Lincoln
Carnegie
Rockefeller
Ford
Gillette
Eastman
Hearst
Fleishmann
Wright
Pullman

These famous people were listed in a book written in 1928 by Napoleon Hill called "The Law of Success". And now, some 85 years later, these names are still famous. 

Why?