sentences:  He was elected to the House of Commons for Mid-Antrim in January 1910, succeeding his uncle Robert Torrens O'Neill.His brother Hugh succeeded him as MP for Mid-Antrim.O'Neill married, at St Paul's Church, Knightsbridge, on 21 January 1902, Lady Annabel Crewe-Milnes, daughter of Robert Crewe-Milnes, 1st Marquess of Crewe.