This is one of a set of twelve oval portraits in matching frames of members of the Hanoverian royal family (406587-90 and 401339-46), only six of which are catalogued by Oliver Millar (OM 634-9 and 1218). They would appear all to have been copied from existing portraits of the first half of the eighteenth century. The set was first recorded in Windsor Castle in the 1870s.

The sitter for this portrait has been identified as Éléonore Marie Desmier d'Olbreuse, Duchess of Brunswick-Luneburg, the grandmother of George II. She is shown wearing a yellow silk bodice over a chemise, fastened by diamond clasps, and a blue, ermine-lined mantle held by a clasp on her left shoulder. Éléonore Marie was born at the Castle of Olbreuse in Deux-Sèvres, France into a Huguenot family of relatively low nobility. She was for a time a lady-in-waiting at the French court in Paris. In 1664 she became the mistress of George William, Duke of Brunswick-Lüneburg and received the title Lady of Harburg. In 1666 their only child, Sophia Dorothea, was born. In 1674 the child was legitimised and Éléonore became the Duchess of Wilhelmsburg and two years later became Duchess of Brunswick-Lüneburg. In 1682, Sophie Dorothea married George Louis, later King George I.