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.
Family.
He was born "His Serene Highness Prince Franz Ferdinand of Hohenberg", but upon the death of his father in 1962, he became the 2nd Duke of Hohenberg and Head of the House of Hohenberg.
On 9 May 1956 in Luxembourg, Prince Franz married Princess Elisabeth of Luxembourg, a daughter of Charlotte, Grand Duchess of Luxembourg. They had two daughters:
Since he had no sons, he was succeeded by his younger brother Georg as Duke of Hohenberg and head of the House of Hohenberg.