Karl I. Franz Joseph Ludwig Hubert Georg Maria Habsburg-Lothringen von Österreich, Emperor of Austria, King of Hungary, was born 17 August 1887 in Schloss Persenbeug, Persenbeug-Gottsdorf, Melk District, Lower Austria, Austria to Otto Franz Joseph von Österreich (1865-1904) and Maria Josepha Luise von Sachsen (1867-1944) and died 1 April 1922 Funchal, Madeira, Portugal of pneumonia. He married Zita di Borbone-Parma (1892-1989) 21 October 1911 in Schloss Schwarzau am Steinfelde, Schwarzau am Steinfelde, Neunkirchen District, Lower Austria, Austria.
Children
| Name | Birth | Death | Joined with |
| Otto von Österreich (1912-2011) | |||
| Adelheid von Österreich (1914-1971) | |||
| Robert von Österreich (1915-1996) | |||
| Felix von Österreich (1916-) | |||
| Karl Ludwig von Österreich (1918-2007) | |||
| Rudolf von Österreich (1919-) | |||
| Charlotte von Österreich (1921-1989) | |||
| Elisabeth von Österreich (1922-1993) | |||