 Mauricio González @-@ Gordon y Díez , Marquis of Bonanza ( 18 October 1923 – 27 September 2013 ) was a Spanish sherry maker and a conservationist . Most of his life he worked for the family company , González Byass , where he increased its exports to a worldwide level . His family estate was located in the wetland region called Doñana in southern Spain and was threatened by drainage efforts in the early 1950s . González @-@ Gordon with the help of researchers and international support managed to preserve the site , while at the same time donating some of his family land to the conservation effort . Afterward , González @-@ Gordon became one of the founders of the Spanish Ornithological Society in 1954 . His conservation efforts for Doñana culminated in the creation of the Doñana National Park in 1969 . The area was designated a UNESCO World Heritage Site in 1994 . 
