François Joseph de Habsbourg-Toscane

Archduke Franz Josef of Austria–Tuscany German: Franz Josef, Erzherzog von Österreich-Toskana was the fourth son of Archduke Leopold Salvator, Prince of Tuscany and Infanta Blanca of Spain. At the fall of Habsburg monarchy he moved to Barcelona, where he became a naturalized Spanish citizen. He married morganatically twice and had a daughter from his second marriage. During World War II he lived in the United States, working in the forestry industry. In 1955 he returned to Austria. He inherited the Carlist pretensions to the Spanish throne of his brother Archduke Karl Pius and called himself Duke of Madrid. He died in 1975.