title: Hugh O'Neill, 3rd Baron Rathcavan
text: # Hugh O'Neill, 3rd Baron Rathcavan
  
  Hugh Detmar O'Neill, 3rd Baron Rathcavan (born 14 June 1939), is a hereditary peer who sat as a crossbencher in the British House of Lords from 1994 until 1999.
  
  He was educated at Eton College.
  
  O'Neill 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.
  
  