Mary Boyle (died 1709) (1670–1709) Parents Lady Jane Seymour Charles Boyle, 3rd Viscount Dungarvan Children Lady Elizabeth Douglas Isabel Douglas Lord George Douglas Lady Anne Douglas James Douglas, 3rd Marquess of Queensberry Jane Scott, Countess of Dalkeith Charles Douglas, 3rd Duke of Queensberry Lady Mary Douglas William Douglas, Earl of Drumlanrig Siblings Arabella Boyle Charles Boyle, 2nd Earl of Burlington Henry Boyle, 1st Baron Carleton Elizabeth Boyle Arethusa Boyle Partners James Douglas, 2nd Duke of Queensberry