German philologist and folklorist Jakob Ludwig Karl Grimm in 1822 formulated Grimm's Law, the basis for much of modern comparative linguistics. With his brother Wilhelm Karl Grimm (1786-1859), he collected Germanic folk tales and published them as Grimm's Fairy Tales (1812-1815). Indo-European stop consonants, represented in Germanic, underwent the regular changes that Grimm's Law describes; this law essentially states that Indo-European p shifted to Germanic f, t shifted to th, and k shifted to h. Indo-European b shifted to Germanic p, d shifted to t, and g shifted to k. Indo-European bh shifted to Germanic b, dh shifted to d, and gh shifted to g. This jurist and mythologist also authored the monumental German Dictionary and his Deutsche Mythologie . Adapted from Wikipedia.

Charles Perrault was a French author who laid foundations for a new literary genre, the fairy tale, and whose best known tales, offered as if they were pre-existing folk tales, include: Little Red Riding Hood, Sleeping Beauty, Puss in Boots, Cinderella, Bluebeard, Hop o' My Thumb), Diamonds and Toads, Patient Griselda, The Ridiculous Wishes... Perrault's most famous stories are still in print today and have been made into operas, ballets (e.g., Tchaikovsky's Sleeping Beauty), plays, musicals, and films, both live-action and animation. The Brothers Grimm retold their own versions of some of Perrault's fairy tales.