Lady Isabel Douglas Peerage person ID=25738 (1630–1672) Parents Lady Anne Keith William Douglas, 7th Earl of Morton Children Lord Charles Graham James Graham, 3rd Marquess of Montrose Lady Grizel Graham Lady Anne Graham Lady Jane Graham Siblings Lady Anne Douglas Lady Mary Douglas Lady Margaret Douglas John Douglas George Douglas James Douglas, 10th Earl of Morton Robert Douglas, 8th Earl of Morton Partners James Graham, 2nd Marquess of Montrose Robert Ker, 1st Earl of Roxburghe