Oh wow, I don't think anyone could know them all! Pretty sure I only know a fraction of the ones that the Grimms collected, for a start! I have various books, and I love just flipping them open to a random page sometimes and seeing what comes up. Non-European fairy tales are harder to come by where I am, but I love finding them as well. (I still have vague plans for a story based on Ye Xian, the Chinese Cinderella variant, but omg so much writing.)

This exchange introduced me to new ones last year, and it's doing it again! Janghwa Hongryeon Jeon looks super interesting, and Morozko.

(It did make me chuckle to see One-Handed Girl back again. One of my hardest wrangling moments was probably tracking down the Swahili title for that story!)