A smaller version of this image had been posted in the Marguerite de Lorraine album as "Marguerite de Lorraine by ? (location unknown to gogm)."
According to her French Wikipédia article, she married three times, but left no surviving children. Image from edievalpoc.org/tag/england/.
The silhouette of Henrietta's dress is the same as in that worn by Marguerite in this image; this dress has a white under-bodice and under-skirt.
Keywords: 1634, van Dyck, Henriette de Lorraine, Henriette de Phalsbourg, Lorraine family, French, curly coiffure, bangs, trapezoidal neckline, rosettes, lace neckline ruff, lace bertha, over-dress, elbow length puffed over-sleeves, arm bands, bows, three quarter length puffed virago under-sleeves, lace back flared cuffs, waist band, basque waistline, full skirt, under-skirt, necklace, earrings