This image has been troublesome. First, it needed major cleanup and then it needed to be darkened to bring out detail. The original is here. The, who is the "Duchess of Stargard, the title given by the Bain Collection. The name Stargard applies to a number of places, but it is probably the title now held by Alice of Mecklenburg-Schwerin - "Duchess of Mecklenburg, Princess of Wenden, Schwerin and Ratzeburg, Countess of Schwerin, Lady of the Lands of Rostock and Stargard, Princess of Mecklenburg-Strelitz." If this is the princess of Mecklenburg-Schwerin, then this is Elisabeth of Anhalt.