Hugh O'Neill, 3rd Baron RathcavanHugh Detmar Torrens O'Neill, 3rd Baron Rathcavan, was a British hereditary peer and businessman who sat as a crossbencher in the House of Lords from 1994 until 1999.Life and careerO'Neill was educated at Eton College. He ran Lamont, a textile company in Northern Ireland, in the 1980s and was chairman of the Northern Ireland Tourist Board before taking on the Brasserie St Quentin in Knightsbridge in 2002. Lord Rathcavan died on 11 November 2025, at the age of 86.