Robert, Archduke of Austria-Este (given names: Robert Karl Ludwig Maximilian Michael Maria Anton Franz Ferdinand Joseph Otto Hubert Georg Pius Johannes Marcus d'Aviano; 8 February 1915 – 7 February 1996), was the second son of
Karl I, (
beatified) last
Emperor of Austria-Hungary, and
Princess Zita of Bourbon-Parma. He was also known as Robert Karl Erzherzog von Österreich.
On 16 April 1917, at the age of two, his father the Emperor ceded the title of Archduke of
Austria-Este in Robert's favor. Archduke Robert was thereby chosen to preserve, in the form of a distinct
secundogeniture, the Habsburg-Lorraine representation of the once-sovereign
Duchy of Modena which had belonged to the
House of Este. He was thus made heir to his assassinated relative
Archduke Franz Ferdinand of Austria (1863–1914), who had inherited in 1875 the Austria-Este designation and what had been salvaged of the Este fortune when the duchy was
annexed to Italy in 1860.
Countess Anna Theresa von und zu Arco-Zinneberg (born 1981) married on 29 September 2018, at
Niederaltaich Abbey in
Bavaria, Colin McKenzie (born 1976).[2][3] They have three children.
Countess Margherita von und zu Arco-Zinneberg (born 1983) married on 19 March 2022, in
Moos, Bavaria, Charles Douglas Green (born 1981)[4][5]
^US investment strategist Colin McKenzie was born in New York and grew up in Spain, Brazil and England. He received a
MA in Mathematics with Philosophy from the
University of Oxford in 1998.
^Charles Douglas Green (b.1981) is the son of the late South African businessman Ian Green and Helena Marian Fermor-Hesketh (née Hunt; widow of The Hon
John Fermor-Hesketh). Charles has several siblings from his father and mother's previous marriages. His half-sister, Annabel Green, is the current
Duchess of Roxburghe.
Generations are numbered by male-line descent from the first archdukes. Later generations are included although Austrian titles of nobility were abolished in 1919.