In the village of Unzue, located in Navarra, Leoncio Arizu was born to Saturnino Arizu and Juana Uriz. The meaning of the family name would be a sign of the importance oak would have in his life, as Arizu means "oak grove". In 1890, a seven-year-old Leoncio arrived in Argentina and settled in Mendoza, where he was met by his uncle Balbino, already involved in the wine business.
By far the largest and best-known winemaking province in Argentina, Mendoza is responsible for over 70% of the country’s enological output. Set in the eastern foothills of the Andes Mountains, the climate is dry and continental, presenting relatively few challenges for viticulturists during the growing season. Mendoza, divided into several distinctive sub-regions, including Luján de Cuyo and the Uco Valley, is the source of some of the country’s finest wines.