Archduke Carl Ludwig of Austria (1918–2007)

Archduke Carl Ludwig of Austria (Carl Ludwig Maria Franz Joseph Michael Gabriel Antonius Robert Stephan Pius Gregor Ignatius Markus d'Aviano; 10 March 1918 – 11 December 2007), also known as Carl Ludwig Habsburg-Lothringen, was the fifth child of Charles I of Austria and Princess Zita of Bourbon-Parma. He was born in Baden bei Wien and died in Brussels.

Life
He studied at the University of Louvain and graduated from Université Laval, in Quebec City where his family was in exile. During the Second World War, Karl Ludwig and his brother Felix volunteered to serve in the 101st Infantry Battalion of the United States Army, known as the "Free Austria Battalion". However, the battalion was disbanded when a number of exiled Jewish volunteers who made up the majority of the force ultimately declined to confirm their enlistment.

He was buried beside his mother in the Kapuziner Crypt in Vienna.

Marriage and issue
He was married in Belœil on 17 January 1950 to Princess Yolande of Ligne (6 May 1923 – 13 September 2023). They had four children:
 * Archduke Rudolf of Austria (Rudolf Maria Carl Eugen Anna Antonius Marcus d'Aviano, born 17 November 1950), married Baroness Hélène de Villenfagne de Vogelsanck (born 24 April 1954) in Brussels on 3 July 1976; their family taking up residence in Belgium thereafter. On 29 May 1978 he, his children and male-line descendants were incorporated in the nobility of Belgium by royal letters patent with the hereditary title Prince/sse de Habsbourg-Lorraine and the style of Serene Highness. Rudolf works at investment managers AAA Gestion, based in Villars-sur-Glâne, Switzerland and lives at De Diesbach Castle. He and Hélène have eight children, who were later recognised by the Head of the Imperial House of Austria as Archdukes and Archduchesses of Austria:
 * Archduke Carl Christian of Austria (b. 1977), married on 2 June 2007 to Estelle de Saint-Romain (b. 1979)
 * Archduchess Priscilla of Austria (b. 1979), engaged in 2022 to Gabriel Contreras Millán
 * Archduke Johannes of Austria (b. 1981), Catholic priest of the Swiss Fraternity Eucharistein
 * Archduke Thomas of Austria (b. 1983), member of the Swiss Catholic Fraternity Eucharistein
 * Archduchess Marie-des-Neiges of Austria (b. 1986), member of the Swiss Catholic Fraternity Eucharistein
 * Archduke Franz-Ludwig of Austria (b. 1988), married in 2018 to Mathilde Vignon (b. 1992)
 * Archduke Michael of Austria (b. 1990)
 * Archduke Joseph of Austria (b. 1991), member of the Swiss Catholic Fraternity Eucharistein
 * Archduchess Alexandra of Austria (born 10 July 1952), married Chilean ambassador to the Holy See Héctor Riesle Contreras (born 16 Feb 1943). They had three children:
 * Felipe Riesle de Habsburgo-Lorena (b. 1986), married to Pilar García-Huidobro Echeverría.
 * María Sofía Riesle de Habsburgo-Lorena (b. 1987), married to Rodrigo Risopatrón Montero.
 * Constanza Riesle de Habsburgo-Lorena (b. 1989), married to Sebastián Prieto Donoso.
 * Archduke Carl Christian of Austria (born 26 August 1954), married Princess Marie Astrid of Luxembourg. Like his older brother, he works at investment managers AAA Gestion, based in Villars-sur-Glâne, Switzerland. Carl Christian and Marie Astrid have five children:
 * Archduchess Marie-Christine Anne Astrid Zita Charlotte of Austria (b. 31 July 1983, Brussels, Belgium). Her engagement was announced on 16 May 2008 to Count Rodolphe Christian Léopold Carl Ludwig Phillipe de Limburg-Stirum (b. 20 March 1979, Uccle, Brussels, Belgium). On 6 December 2008 married in a civil ceremony in Mechelen town hall, Mechelen, Belgium and then a religious ceremony at St. Rumbold's Cathedral in Mechelen, Belgium. They have three sons:
 * Count Léopold Menno Philippe Gabriel François-Xavier Marie Joseph Ghislain de Limburg-Stirum (b. 19 April 2011, Buenos Aires, Argentina).
 * Count Constantin de Limburg-Stirum (b. 25 October 2013, Buenos Aires, Argentina).
 * Count Gabriel de Limburg-Stirum (b. 2016).
 * Archduke Imre Emanuel Simeon Jean Carl Marcus d'Aviano of Austria (b. 8 December 1985, Geneva, Switzerland), his engagement to Kathleen Elizabeth Walker (b. 17 April 1986, Cincinnati, Ohio, US), was announced on 22 December 2011. They met in April, 2010. The couple got married on 8 December 2012 at Saint Mary, Mother of God Catholic Church, Washington, D.C., United States. They have four daughters and one son:
 * Archduchess Maria-Stella Elizabeth Christiana Yolande Alberta of Austria (b. 11 November 2013, Kirchberg, Luxembourg).
 * Archduchess Magdalena Maria Alexandra Zita Charlotte of Austria (b. 24 February 2016, Kirchberg, Luxembourg).
 * Archduchess Juliana Marie Christine Wilhelmina Margaret Astrid of Austria (b. 14 October 2018, Geneva, Switzerland).
 * Archduchess Cecilia Marie Josephine Adelaide Henrietta of Austria (b. 15 January 2021, Geneva, Switzerland).
 * Archduke Karl of Austria (b. 4 June 2023, Geneva, Switzerland).
 * Archduke Christoph Henri Alexander Maria Marcus d' Aviano of Austria (b. 2 February 1988, Geneva, Switzerland). His engagement to Adélaïde Marie Béatrice Drapé-Frisch (b. 4 September 1989, Les Lilas, Paris, France), was announced on 22 December 2011. The couple married on 29 December 2012 at Basilica of Saint-Epvre (fr:Basilique Saint-Epvre de Nancy) in Nancy, France. They have four children:
 * Archduchess Katarina Marie-Christine Fabiola of Austria (b. 22 December 2014, Geneva, Switzerland).
 * Archduchess Sophia of Austria (b. 31 August 2017, Geneva, Switzerland).
 * Archduke Josef of Austria (b. October 2020, Geneva, Switzerland).
 * Archduchess Flavia of Austria (b. 2023)
 * Archduke Alexander Hector Marie Karl Leopold Marcus d'Aviano of Austria (b. 26 September 1990, Meyrin, Switzerland). He married on 30 September 2023 at Belœil, Belgium, to Natacha Roumiantzeff-Pachkevitch.
 * Archduchess Gabriella Maria Pilar Yolande Joséphine-Charlotte of Austria (b. 26 March 1994, Geneva, Switzerland). She became engaged to Prince Henri Luitpold Antoine Victor Marie Joseph of Bourbon-Parma (b. 14 October 1991, Roskilde, Denmark), on 22 October 2017. The couple were married on 12 September 2020 at Tratzberg Castle, Jenbach, Tyrol, Austria. They have three daughters:
 * Princess Victoria Antonia Marie-Astrid Lydia of Bourbon-Parma (b. 30 October 2017, Geneva, Switzerland).
 * Princess Anastasia Erika Alexandra Marie Yolande of Bourbon-Parma (b. 3 July 2021, Geneva, Switzerland).
 * Princess Philippina of Bourbon-Parma (b. 2023)
 * Archduchess Maria Constanza of Austria (born 19 October 1957), married Franz Josef, Prince (Fürst) von Auersperg-Trautson (born 11 December 1954) in Beloeil, Belgium, on 18 June 1994. They have three biological daughters (one died shortly after her birth) and one adopted daughter, Anna Maria (who bear the family name Prinzessin von Auersperg-Trautson and the courtesy title of Princess of Auersperg-Trautson):
 * Princess Anna Maria of Auersperg-Trautson (b. 24 September 1997)
 * Princess Alexandra Maria of Auersperg-Trautson (b. and d. 9 February 1998)
 * Princess Ladislaya of Auersperg-Trautson (b. 26 February 1999)
 * Princess Eleonora of Auersperg-Trautson (b. 28 May 2002).