Arthur O'Neill British politician (1876–1914) Parents Lady Louisa Cochrane Edward O'Neill, 2nd Baron O'Neill Children Brian Arthur O'Neill Terence O'Neill Sibyl O'Neill Mary Louisa Hermione O'Neill Shane O'Neill, 3rd Baron O'Neill Siblings Hugh O'Neill, 1st Baron Rathcavan William O'Neill Rose O'Neill Louisa O'Neill Alice O'Neill Partners Lady Annabel Crewe-Milnes
