Disney Princess, also called the Princess Line,
is a media franchise and toy-line owned by The Walt Disney Company. Created by Disney Consumer Products chairman Andy Mooney in the early 2000s, the franchise features a line-up of fictional female protagonists who have appeared in various Disney franchises.
The franchise does not include all princess characters from the whole of Disney-owned media, but rather refers to select specific characters from the company's animated films and series. The 12 characters considered part of the franchise are Snow White, Cinderella, Aurora, Ariel, Belle, Jasmine, Pocahontas, Mulan, Tiana, Rapunzel, Merida, and Moana.
The franchise has released dolls, sing-along videos, apparel, beauty products, home decor, toys and a variety of other products featuring some of the Disney Princesses. Licensees for the franchise include Glidden (wall paint), Stride Rite (sparkly shoes), Hasbro (games and dolls), and Fisher-Price (plastic figurines).
Source: Wikipedia, "Disney Princess", available under the CC-BY-SA License.