Hans Adam Ferdinand Alois Josef Maria Marco d'Aviano Pius (full name: Johannes Adam Ferdinand Alois Josef Maria Marco d'Aviano Pius; born February 14, 1945) was the head of state of Liechtenstein in Central Europe. He was the eldest son of Franz Joseph II (1906-1989) and his wife Gina von Wilczek (1921-1989).

Hans Adam was born on February 14, 1945 in Zurich, Switzerland. He studied in Vienna and St. Gallen, Switzerland, and received vocational training at a bank in London. Obtained a Bachelor's degree in Economics. In August 1984, his father Franz Joseph II delegated most of the power to him and entrusted him with the responsibility of government affairs. On November 13, 1989, Joseph II passed away, and on the same day, Hans Adam announced his succession and named himself Hans Adam II. Having expertise in finance and economics, advocating active participation in international affairs. After taking office, he successively joined the United Nations, the European Free Trade Association, and the European Economic Area

Hans Adam and his wife, Countess Kinsky von Wchinitz und Tettau's Countess Marie Agla ë, married on July 30, 1967, and had four children together
Prince Alois (born on June 11, 1968 in Zurich), married Princess Sophie of Bavaria (born on October 28, 1967 in Munich) on July 3, 1993 in Vaduz, and they have four children:
(1) Joseph Wenzel Maximilian Maria, born on May 31, 1995 in London
(2) Marie Caroline Elisabeth Immaculata, born on October 17, 1996 in Switzerland
(3) Georg Antonius Constantin Maria, born on April 20, 1999
(4) Nikolaus Sebastian Alexander Maria, born on December 6, 2000
Prince Maximilian Nikolaus Maria (born May 16, 1969 in St. Gallen, Switzerland) and his wife Angela Gisele Brown (born February 3, 1958 in Bocas del Toro, Panama) got married in January 2000 and have one child:
(1) Alfons Constantin Maria, born on May 18, 2001 in London
Prince Constantin Ferdinand Maria (born on March 15, 1972 in St. Gallen, Switzerland, to Countess Marie Gabriele Franziska K á lnoky de K ő r ö spatak) (born on July 16, 1975 in Graz, Austria), married in July 1999. They have one son and one daughter:
(1) Moritz Emanuel Maria, born on May 27, 2003 in New York
(2) Georgina Maximiliana Tatiana Maria, born on July 23, 2005

Princess Tatjana Nora Maria (born on April 10, 1973 in St. Gallen) and her husband Philipp von Lattorf (born on March 25, 1968 in Graz) got married on June 5, 1999. They have three children:
(1) Elisabeth Maria Angela Tatjana von Lattorff, born on May 13, 2000 in Wiesbaden
(2) Lukas Marie von Lattorff, born on January 25, 2002
(3) Marie Teresa von Lattorff, born on January 18, 2004