Wife of Fazio. When Fazio became rich, and got entangled with the Marchioness Aldabella, she accused him to the Duke of Florence of being privy to the death of Bartoldo, an old miser. Fazio was arrested and condemned to death. Bianca now repented of her jealous rashness, and tried to save her husband, but failing in her endeavours, went mad, and died of a broken heart. (Dean Milman: Fazio. N. B. —The name is employed by Shakespeare both in his Taming of the Shrew and also in Othello.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
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