Letitia Morres (died 1801) (1746–1801) Parents Hervey Morres, 1st Viscount Mountmorres Lady Letitia Ponsonby Children Charlotte MacDonnell, Countess of Antrim Arthur Hill-Trevor, 2nd Viscount of Dungannon Anne Katherine Mac Donnell, Countess of Antrim Lady Letitia Mary MacDonnell Siblings William Mary Morres Francis Hervey de Montmorency, 3rd Viscount Mountmorres Sarah Morres Hervey Redmond Morres, 2nd Viscount Mountmorres Partners Arthur Trevor Randal William MacDonnell, 1st Marquess of Antrim