Frances Ponsonby (1757-1827) (1757–1827) Parents Lady Elizabeth Cavendish John Ponsonby Children Cornelius O'Callaghan, 1st Viscount Lismore George O'Callaghan Mary O'Callaghan Louisa Cavendish Elizabeth O'Callaghan Robert O'Callaghan Siblings William Ponsonby, 1st Baron Ponsonby Catharine Ponsonby George Ponsonby Mary Charlotte Ponsonby Partners Cornelius O'Callaghan, 1st Baron Lismore
