Prince Constantijn was born on 11 October 1969 at Academic Hospital Utrecht (now the
University Medical Center Utrecht) in
Utrecht following the births of his brothers,
Willem-Alexander (b. 1967), and
Johan Friso (1968–2013). He goes by the nickname
Tijn. His godparents are former King
Constantine II of Greece (1940–2023),
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 the (Dutch)
European Union commissioner of foreign relations,
Hans 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 spent a summer working for the
International Finance Corporation (part of the
World Bank Group) in
Washington, DC. 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. Prince Constantijn rarely attends public events in his capacity as a member of the Dutch royal family. He is a keen sportsman and enjoys
football, tennis, golf, and
skiing. His other hobbies include drawing, cooking, and
reading. ==Marriage and family==