From Leon Wilnitsky; the whole upper edge and the lower left corner were fixed and spots were removed throughout the image with Photoshop by gogm.
The coiffure, hat, and bertha suggest this portrait comes from around the time of the French Revolution. Her father was born in 1752; adding two generations creates a date of about 1790.
Keywords: de Choiseul-Gouffier family, French, straight coiffure, ribboned hat, lace cap, scoop neckline, bertha, tight sleeves, waist band, natural high waistline