He was the eldest son of Prince Alfred of Liechtenstein (1900–1972) – a descendant of Johann I Joseph, Prince of Liechtenstein – and Countess Polixena of Collalto and San Salvatore (1905–1984).
The couple had three sons, starting with twins in 1961, Christian and Stefan of Liechtenstein - Christopher became a doctor in Villach and Stefan became Liechtenstein's ambassador to Germany in 2007.
Their third son Emanuel was born in 1964 and took over management of the Schloss and its attached zoo and waxwork display.
Alexander was buried on 24 March 2012 in Rosegg's municipal cemetery.
This biography of a member of a European royal house is a stub.