John Bruce Richard O'Neill, 3rd Viscount O'Neill (30 December 1780 – 12 February 1855) was an Irish Tory politician who sat in the House of Commons from 1802 to 1841 and then in the House of Lords.
O'Neill was the son of John, Viscount O'Neill and his wife Henrietta Frances Boyle.
An Act to relieve the Honourable John Bruce Richard O'Neill, who was elected to serve in this present Parliament for the County of Antrim, from certain Penalties which he has incurred by sitting and voting in the House of Commons without having taken the Oaths, and in other Respects conformed to the Laws in such Case made and provided.
O'Neill died at the age of 74. His title became extinct, but his estates passed to a relative, William Chichester, who subsequently assumed the surname O'Neill and received the Barony of O'Neill.
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