Dutch royal family

HM The King * HM The Queen * HRH The Princess of Orange * HRH Princess Alexia * HRH Princess Ariane * HRH Princess Beatrix * HRH Princess Mabel Countess Luana Countess Zaria HRH Prince Constantijn * HRH Princess Laurentien * Countess Eloise Count Claus-Casimir Countess Leonore Extended royal family HRH Princess Irene HRH The Duke of Parma HRH The Duchess of Parma HRH The Countess of Colorno HE The Count of Colorno HRH The Count of Bardi HRH The Countess of Bardi HRH The Marchioness of Sala HE The Marquess of Sala HRH Princess Margriet * Professor Pieter van Vollenhoven * HH Prince Maurits HH Princess Marilène HH Prince Bernhard HH Princess Annette HH Prince Pieter-Christiaan HH Princess Anita HH Prince Floris HH Princess Aimée HRH Princess Christina Bernardo Guillermo Eva Guillermo Nicolás Guillermo Juliana Guillermo * Member of the Dutch royal house

Prince Constantijn of the Netherlands (Constantijn Christof Frederik Aschwin; born 11 October 1969) is the third and youngest son of the former Dutch queen, Beatrix, and her husband, Claus von Amsberg, and is the younger brother of the current Dutch monarch, King Willem-Alexander of the Netherlands. He is a member of the Dutch Royal House and currently fourth in the line of succession to the Dutch throne.

Prince Constantijn was born in , following the births of his brothers, Willem-Alexander (born in 1967), and Johan Friso (1968–2013). He goes by the nickname Tijn. His godparents are former King Constantine II of Greece, Prince Aschwin of Lippe-Biesterfeld, Axel Freiherr von dem Bussche-Streithorst, Max Kohnstamm, and Corinne de Beaufort-Sickinghe.

Prince Constantijn studied Law at Leiden University, becoming a lawyer, and then worked at the Brussels department of (Dutch) European Union commissioner of foreign relations Van den Broek. Later, he was hired by the EU, and continued to work there in various capacities until the end of 1999. In December 2000, he was awarded a Master of Business Administration at INSEAD in Fontainebleau, France. He then spent a summer working for the International Finance Corporation of the World Bank group in Washington, D.C.. He worked until late 2002 for strategic consultants Booz Allen Hamilton in London. Since 2003 he works for the RAND Corporation Europe in Brussels. Furthermore, he has a part-time position at the Netherlands Ministry of Foreign Affairs in The Hague.