Source note

VYDER, anagram formed from d'Ervy, and one of the three names taken successively by Baron Hector Hulot d'Ervy, after deserting his wife. He hid under this assumed name, when he became a petition-writer in Paris, in the lower part of Petite Pologne, opposite rue de la Pepiniere, on Passage du Soleil, to-day called Galerie de Cherbourg. [Cousin Betty.]