Prince Ernst of Hohenberg
Prince Ernst of Hohenberg(" Ernst Alfons Franz Ignaz Joseph Maria Anton von Hohenberg"; 27 May 1904 – 5 March 1954) was the second son of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg, who were assassinated at Sarajevo in 1914.
Elisabeth Strickrodt
Elisabeth Strickrodt, Countess of Askanien, formerly Elisabeth, Duchess of Anhalt,( 3 September 1903 – 5 January 1971) was a German actress and the first wife of Joachim Ernst, Duke of Anhalt.
Princess Sophie of Hohenberg
Princess Sophie of Hohenberg(" Sophie Marie Franziska Antonia Ignatia Alberta von Hohenberg"; –) was the only daughter of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg, both of whom were assassinated at Sarajevo on 28 June 1914.
Their assassination triggered the First World War, thus Sophie and her two brothers are sometimes described as the first orphans of the First World War.
Prince Felix of Bourbon-Parma
Prince Félix of Bourbon-Parma ("Félix Marie Vincent"; 28 September 1893 – 8 April 1970), later Prince Félix of Luxembourg, was the husband of Charlotte, Grand Duchess of Luxembourg and the father of her six children, including her successor: Grand Duke Jean.
He was the longest serving consort of Luxembourg.
Princess Elisabeth, Duchess of Brabant
Princess Elisabeth, Duchess of Brabant( born 25 October 2001), is the heir apparent to the Belgian throne.
The eldest child of King Philippe and Queen Mathilde, she acquired her position after her grandfather King Albert II abdicated in favour of her father on 21 July 2013.
Princess Elisabeth, Duchess in Bavaria
Princess Elisabeth, Duchess in Bavaria( born 31 December 1940) is the wife of Prince Max, Duke in Bavaria, heir presumptive to both the former Bavarian Royal House and the Jacobite Succession.
Princess Eléonore of Belgium
Princess Eléonore of Belgium( Eléonore Fabiola Victoria Anne Marie; born 16 April 2008) is the younger daughter and the youngest of four children of King Philippe and Queen Mathilde of Belgium.
She is currently fourth in line to the throne of Belgium after her older siblings Princess Elisabeth, Duchess of Brabant, Prince Gabriel, and Prince Emmanuel.
Georg, Duke of Hohenberg
Georg, Duke of Hohenberg( 25 April 1929 – 25 July 2019), was a grandson of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg.
At the time of his death he was the senior agnate of the House of Habsburg- Lorraine.
Princess Elisabeth, Duchess of Hohenberg
Princess Elisabeth, Duchess of Hohenberg (Elisabeth Hilda Zita Marie Anna Antonia Friederike Wilhelmine Luise; 22 December 1922 – 22 November 2011) was a Luxembourgian princess.
She was a daughter of Grand Duchess Charlotte and her husband, Prince Felix of Bourbon-Parma, the sister of Grand Duke Jean and the aunt of Grand Duke Henri.
In 1956 she married Franz, Duke of Hohenberg.
Franz, Duke of Hohenberg
Franz Ferdinand, Duke of Hohenberg( 13 September 1927 – 16 August 1977), was the eldest son of Maximilian, Duke of Hohenberg and Countess Maria of Waldburg zu Wolfegg und Waldsee.
He was also a grandson of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg.
As a result of that morganatic marriage, the Hohenbergs were excluded from the line of succession to the Austro- Hungarian throne.
Following the socialist take- over in Vienna during the chaos at the close of The Great War and their exiling of the monarchy, all Austrian titles were subsequently abolished by law in 1919.
From then on, names officially consisted only of forename and surname, without von or titles, scilicet" Franz Ferdinand Hohenberg".
Most simply ignored this Decree.

Question: What is the date of birth of Princess Elisabeth, Duchess Of Hohenberg's father?