It is not explained why Bluebeard murdered his first bride; she could not have entered the forbidden room and found a dead wife. Some scholars have theorized that he was testing his wife's obedience, and that she was killed not for what she discovered there, but because she disobeyed his orders.[23]
In the 1812 version published in Grimms' Fairy Tales, Wilhelm Grimm, on p. XLI of the annotations, makes the following handwritten comment: "It seems in all Märchen [fairy tales] of Bluebeard, wherein his Blutrunst [lust for blood] has not rightly explained, the idea to be the basis of himself through bathing in blood to cure of the blue beard; as the lepers. That is also why it is written that the blood is collected in basins."
Maurice Maeterlinck wrote extensively on Bluebeard and his plays name at least six former wives: Sélysette from Aglavaine et Sélysette (1896), Alladine from Alladine et Palomides (1894), both Ygraine and Bellangère from La mort de Tintagiles (1894), Mélisande from Pelléas et Mélisande, and Ariane from Ariane et Barbe-bleue (1907).
In Jacques Offenbach's opera Barbe-bleue (1866), the five previous wives are Héloïse, Eléonore, Isaure, Rosalinde and Blanche, with the sixth and final wife being a peasant girl, Boulotte, who finally reveals his secret when he attempts to have her killed so that he can marry Princess Hermia.
Béla Bartók's opera Bluebeard's Castle (1911), with a libretto by Béla Balázs, names "Judith" as wife number four.
Anatole France's short story "The Seven Wives of Bluebeard" names Jeanne de Lespoisse as the last wife before Bluebeard's death. The other wives were Collette Passage, Jeanne de la Cloche, Gigonne, Blanche de Gibeaumex, Angèle de la Garandine, and Alix de Pontalcin.
In Edward Dmytryk's film Bluebeard (1972), Baron von Sepper (Richard Burton) is an Austrian aristocrat known as Bluebeard for his blue-toned beard and his appetite for beautiful wives, and his wife is an American named Anne.
In Alex Garland's film Ex Machina (2014), Nathan is an internet mogul who designs robots with a human female body inside his home. Each time he starts a new iteration of the robot, he eliminates the AI of the previous one and puts the robot body inside a cupboard in his vault. Nathan's company is called Blue Book and a key plays a central role in the movie.
