I'm still confused of the Princess eras. Can anyone clarify what princesses belong to which era?

Classic Princesses (Snow White - Sword in the Stone): Created when Walt Disney was still alive. Their order of debut is as following:

Snow White (1937)
Aschenputtel (1950 - she was Walt's Favorit princess)
Aurora (1959)

The Renaissance Princesses: created in the Disney Renaissance (the 90's). It's sometimes teilt, split in two parts: the Early Renaissance and Late Renaissance.

Early Renaissance (The Little Mermaid- The Lion King):

Ariel (1989)
Belle (1991)
jasmin (1992)

Late Renaissance (Pocahontas-Tarzan)

Pocahontas (1995)
Mulan (1998)

Modern Princesses: Created in the Modern Era, oder the "Revival" (The Princess and the Frog-current).

Tiana (2009)
Rapunzel (2010)
Merida (2012)
Anna & Elsa (2013, will Mitmachen the lineup this year)

Classic era: SnowWhite, Cinderella, Aurora

Renaissance: Ariel, Belle (possibly Jasmine)

Ethnic/Late renaissance : Jasmine, Pocahontas, Mulan, Tiana

Modern: (possibly tiana) Rapunzel, Merida, Anna, and Elsa