Charles I of Austria › Children
Otto von Habsburg
Robert, Archduke of Austria-Este
Archduchess Elisabeth of Austria (1922–1993)
Archduke Carl Ludwig of Austria
Archduke Felix of Austria
Archduke Rudolf of Austria (1919–2010)
Archduchess Adelheid of Austria
Archduchess Charlotte of Austria
Last monarch of Austria-Hungary
Charles I was Emperor of Austria, King of Hungary and King of Croatia (as Charles IV, Hungarian: IV. Károly, Croatian: Karlo IV. ), King of Bohemia (as Charles III, Czech: Karel II... Wikipedia