Nadejda Mikhailovna de Torby
From the USA Library of Congress Bain collection; I removed spots in the background and two on the face with Photoshop.
Nadejda wears the same dress as in the last image.
Keywords: Nadejda Torby, Romanov family, Battenberg-Mountbatten family, Countess, straight coiffure, ribbon headdress, trapezoidal neckline, under-bodice, over-bodice, elbow length close sleeves, lace, waist band, bows, natural waistline, necklace