Lady Mary Douglas Peerage person ID=30402 (d. 1659) Parents Lady Anne Keith William Douglas, 7th Earl of Morton Children Lady Henrietta Seton Alexander Seton, 3rd Earl of Dunfermline James Seton, 4th Earl of Dunfermline Siblings Lady Anne Douglas Lady Isabel Douglas Lady Margaret Douglas John Douglas George Douglas James Douglas, 10th Earl of Morton Robert Douglas, 8th Earl of Morton Partners Charles Seton, 2nd Earl of Dunfermline