Hugh Detmar Torrens O'Neill, 3rd Baron Rathcavan British peer (born 1939) (1939–2025) Parents Phelim O’Neill, 2nd Baron Rathcavan Clare Désirée Blow Children François Hugh Nial O'Neill Siblings Grania Elizabeth O'Neill Mary Rose O'Neill Rosetta Anne O'Neill Kathleen O'Neill Moira Louisa O'Neill Kathleen Mary Starkey Partners Sylvie Marie-Thérèse Wichard