Waverly is the daughter of Buttercup and Westley and is mentioned in the 25th edition of The Princess Bride.
Birth Story[]
Waverly is Buttercup and Westley's daughter, introduced in Buttercup's Baby, (she is not present in the original novel, The Princess Bride). She's born via C-section after 50 hours of labor, thanks to something or someone that possesses Fezzik and guides him through performing the procedure. She and Fezzik form a close bond and spend most of their time together. Buttercup's Baby begins and ends with the madman kidnapping Waverly and throwing her off of a cliff, though Goldman notes in earlier introductions that Waverly and Fezzik (who jumps off after her) are saved from their fall by the miraculous appearance of a giant bird.
One Tree Island[]
The island one tree is protected by a whirlpool, which is known to have a reputation of people not going past it. The crew (Butter, Westley, Inigo, and Fezzik) managed to get past it and start a life on One Tree Island.