Standish O'Grady, 1st Viscount Guillamore Irish peer (1766–1840) Parents Mary Smyth Darby O'Grady Children James O'Grady Thomas O'Grady John O'Grady Isabella O'Grady Waller O'Grady Katherine O'Grady Henrietta O'Grady William O'Grady Julia O'Grady Richard O'Grady Standish O'Grady, 2nd Viscount Guillamore Maria O'Grady Siblings Edward Smyth O'Grady Darby O'Grady unknown daughter O'Grady James O'Grady Martha O'Grady Harriot O'Grady Hayes O'Grady Thomas O'Grady Partners Katharine Waller