Premise: Prince Karl Alfred of Liechtenstein (Karl Alfred Maria Johannes Baptista Heinrich Aloys Georg Hartmann Ignatius; 16 August 1910 – 17 November 1985) was a Liechtensteiner prince and brother of Franz Joseph II. He was the third child and second son of Prince Aloys of Liechtenstein and Archduchess Elisabeth Amalie of Austria.
Hypothesis: Prince Karl Alfred had two siblings.