Archduke Sigismund, Grand Duke of Tuscany

Archduke Sigismund Otto Maria Josef Gottfried Heinrich Erik Leopold Ferdinand of Austria, Grand Duke of Tuscany (born 21 April 1966) is the current head of the Tuscan branch of the House of Habsburg-Lorraine and titular Grand Duke of Tuscany. His great-great grandfather Ferdinand IV was the last reigning Grand Duke of Tuscany.

Biography
Sigismund was born in Lausanne the son of Archduke Leopold Franz of Austria and his first wife Laetitia d'Arenberg, born Laetitia de Belzunce (and adopted by her stepfather Erik, 11th Duke of Arenberg). Sigismund has a BSc in computer science and has worked as a software engineer banker.

On 18 June 1993, upon his second marriage, Sigismund's father Leopold Franz renounced his rights as Head of the Tuscan branch of the Habsburgs in favour of Sigismund. At the same time Sigismund succeeded his father as Grand Master of the Order of Saint Joseph and the Order of Saint Stephen, the two orders of knighthood of the Grand Ducal House of Tuscany. He has also a served as a patron for the Almanach de Gotha.

Sigismund was raised in Uruguay and Switzerland by his mother and father. His maternal family are said to possess businesses in Uruguay.

Family
In 1999, Sigismund married Elyssa Edmonstone (born Glasgow, 11 September 1973), the only daughter of Sir Archibald Bruce Edmonstone, of Duntreath, 7th Baronet by his second wife Juliet Elizabeth Deakin. Archduchess Elyssa is a great-great-granddaughter of Marshall Field and a third cousin of Camilla, Duchess of Cornwall. The Edmonstone family is an old Scottish family that was raised to a baronetcy in 1774; their best-known member was the royal mistress Alice Keppel. Through this family connection, Elyssa and Camilla, Duchess of Cornwall are third cousins. The couple are divorced since 25 June 2013, with annulment in 2016. The couple have three children, Archduke Leopold, Grand Prince of Tuscany, Archduchess Tatyana and Archduke Maximilian.

Sigismund lives with his family in Lausanne, Switzerland. In 2017, the renunciation of French citizenship (obtained through his French mother) was legally recorded for him and his children, under the name Sigismond Otto Maria Joseph Gottfried Heinrich Erik Leopold Ferdinand de Habsbourg-Lorraine.

Titles and styles
As head of the grand ducal house of Tuscany, Sigismund's titles include Archduke of Austria, Prince of Hungary and Bohemia and Grand Duke of Tuscany with the style His Imperial and Royal Highness.