Kate Dickens Perugini, daughter of Charles Dickens, served as the model for The Black Brunswicker (painted by Millais). The Lady Lever Art Gallery has an extended study of this painting online.
Kate, one of the ten children of Dickens, married Pre-Raphaelite artist Charles Allston Collins. Collins brother, Wilkie Collins, was the author of The Moonstone and The Woman in White. Her life is quite interesting and has been captured in a vivid and poignant biography by Lucinda Hawksley, herself a descendant of Dickens and the author of another Pre-Raphaelite beauty, Elizabeth Siddal.
Here’s a brief article Hawklsey has written about Kate, who latered married Italian artist Carlo Perugini.
Her first husband, Charles Allston Collins, at ArtMagick
Valentine Cameron Prinsep, with whom Katey had an affair.
Her second husband, Charles Perugini, at ArtMagick