From calantheandthenightingale.tumblr.com/post/7044501697/elena-g-chertkov-1800-1832-daughter-of.
The similarities between this portrait and the one in the last image are substantial. She wears a dragonfly brooch.
Keywords: Sokolov, Elena G. Chertkova, Stroganov family, Chertkov family, Countess, Russian, straight coiffure, bun, bateau neckline, modesty piece, pleated bodice, lace, dual upper puffed sleeves, belt, natural waistline, full skirt, earrings, brooch, bracelets, wrap