She is a daughter of Henri de Belzunce and Marie-Thérèse de la Poëze d'Harambure, members of the historical French nobility by birth Her father was an officer in the Moroccan Tirailleurs and died fighting for France at the Battle of Monte Cassino, on May 13, 1944. On August 20, 1949 her mother was re-married, to Prince Erik Engelbert, 11th Duke of Arenberg.
She is a French Uruguayan businesswoman. He belonged to a family of ancient nobility in France, originally from Lower Navarre, who held the seigneurie of Belzunce near Bayonne, where the family was notable since the 12th century, and had received the Honneurs de la Cour at Paris in 1739. In 1951, she moved with her family to Uruguay because her family feared expansion of the Korean War to Europe.
Although the adoption did not entitle her to use or inherit his family's dynastic titles and styles of prince, duke and Serene Highness, her legal surname became "de Belzunce d'Arenberg", and she became one of the heirs to his personal fortune. She is the owner of many companies, including Las Rosas, Simoca (Lapataia), Liderak (Mondial/Juki motorcycle importer), Bor (Mitsubishi Motors and Great Wall Motor automobiles importer), Nimansur (JAC Motors trucks importer), and others.
By decree of the President of the French Republic, Nicolas Sarkozy, on April 10, 2009, Laetitia of Arenberg was accorded the medal of the Legion of Honor in the grade of Knight (Chevalier). This distinction was awarded in recognition of her 30 years of professional success which encompassed commitment to numerous social projects in Uruguay, particularly to benefit disadvantaged children and young people addicted to drugs. The official award ceremony occurred on 24 September, sponsored by a French Senate delegation during an official visit to Uruguay, led by Senator Jean-Marc Pastor, accompanied by Senators R�my Pointereau, Fran�ois Fortassin, G�rard Miquel and Annie Jarraud-Vergnolle.
