Laetitia d'Arenberg Uruguayan businesswoman and socialite (b. 1941) Parents Marie-Thérèse de la Poëze d'Harambure Henri René Marie de Belzunce-Castelmauron, Marquis de Belzunce Children Archduke Sigismund, Hereditary Grand Duke of Tuscany Guntram Maria Erzherzog von Österreich Partners Archduke Leopold Franz of Austria
