Who is XXX's father?
Prince Aloys of Liechtenstein
Prince Aloys of Liechtenstein (Aloys Gonzaga Maria Adolf; 17 June 1869 in Hollenegg -- 16 March 1955 in Vaduz) was the son of Prince Alfred of Liechtenstein (1842--1907) and Princess Henriette of Liechtenstein (1843--1931), daughter of Alois II of Liechtenstein.
Prince Alfred of Liechtenstein