Willem-Alexander (Willem-Alexander Claus George Ferdinand; born 27 April 1967), is the King of the Netherlands. He is the eldest child of Princess Beatrix and Prince Claus. He has been the head of the House of Amsberg since the death of his father in 2002. He served in the Dutch military. He studied history at Leiden University. King Willem-Alexander is interested in international water management issues and sports. He married Máxima Zorreguieta Cerruti in 2002. They have three daughters: Princess Catharina-Amalia (born 2003), Princess Alexia (born 2005), and Princess Ariane (born 2007).