Elise Döhler née Elisaveta Sergeyevna Sheremeteva (1818-1890) & husband Theodore Döhler by Ivan Makarov, 1846
And here a Daguerreotype photo of the couple from about the same period. They look more flattering in the painting, don’t you think? The lady was also referred to as Countess Elizabeth Dehler-Sheremetyeva, or Yelizaveta Döhler (born Sheremetyeva).
source: WikiCommons