I can find almost nothing about her. A brief genealogical sketch is here. Her husband's Wikipedia article shows she was the second of three wives. His next wife was Maria Anna de La Grange d'Arquien.
From the-athenaeum via pinterest.com/chevenement/pretty-women/; filled in shadows to bring out coiffure.
Mignard portrays Konstancja Wielopolska in French dressy casual style with a lace chemise peeking out at the top and puffed sleeves.
Keywords: 1664, Mignard, Konstancja Krystyna Wielopolska, Komorowski family, Wielpolski family, hurluberlu coiffure, hair jewelry, chemise, off shoulder scoop neckline, lace modesty piece, elbow length puffed under-sleeves, lace cuffs, bodice, quarter length notched puffed over-sleeves, necklace, earrings, brooch, clasps, wrap