Some Wikipedia articles have brief biographic summaries. This Google language tools translation is from her Russian language Wikipedia article:
"Birth name: Laval
Date of Birth: November 27, 1800
Place of birth: Kiev
Date of death: October 14, 1854 (53 years)
Place of death: Irkutsk
Father: Laval, Ivan StepanovichZhan-François (1761-1846)
Mother: Kozitskaya Alexander G. (1772-1850)
Spouse: since 1821 Troubetzkoy, Sergey Petrovich (1790-1860)
Children: 4 daughters and 3 sons."
From Wikimedia.
Wikimedia dates this to 1828, but the high waistline of this Bestuzhev portrait of Ekaterina Troubetskaia suggests 1818.
Keywords: Bestuzhev, Ekaterina Troubetskaia, Laval family, Troubetskoy family, Russian, hurluberlu coiffure, braided bun, scoop neckline, upper puffed close sleeves, Empire low waistline