Hugh 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.
- Occupation
- politician
- Position held
- member of the House of Lords
- Citizenship
- United Kingdom
- Born
- June 14, 1939
- Died
- November 11, 2025