(Aurora). The model of this exquisite sketch was Miss
Millbank, as she appeared to Lord Byron when he first knew her. Miss
Millpond (a little farther on in the same canto) is the same lady after
marriage. In canto i., Donna Inez is an enlarged portrait of the same
person. Lord Byron describes himself in the first instance under the
character of Don Juan, and in the last as Don José.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894