or Aldabelle (in Orlando Furioso). Sister of Oliviero and Brandimarte, daughter of Monodantes, and wife of Orlando. Aldabella. A marchioness of Florence, who gave entertainment to the magnates of the city. She was very handsome, heartless, and arrogant. When Fazio became rich with Bartoldo's money, Aldabella inveigled him from his wife, and his wife, out of jealousy, accused her husband of being privy to Bartoldo's death. Fazio being condemned for murder and robbery, his wife Bianca accused Aldabella of inveigling him, and the marchioness was condemned by the Duke of Florence to spend the rest of her life in a nunnery. —Dean Milman: Fazio.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894