Margaret, Daughter of Sir George Chudleigh Married Henry Oxendon Thomas Hudson (1701-1779)

The picture has something of this: people, dress, woman, portrait, wear, model, fashion, wedding, girl, princess, veil, queen, costume, jewelry, bride, theater.
Perhaps it’s a painting of a woman in a brown dress with a blue sash around her neck and a bouquet of flowers in her hand in front of her left hand.