From Wikimedia; darkened by gogm.
Maria Olenina may be wearing a canezou or a bertha with a downturned center part in her 1836 Hau portrait and a vee waistline. Her sleeves appear to have engageantes.
Keywords: 1836, Hau, Olenin family, Russian, hurluberlu coiffure, tie, off shoulder vee neckline, bertha, lace, vee waistline