He is the eldest child of Queen Beatrix and Prince Claus, Jonkheer van Amsberg. He has one living younger brother, Constantijn, and one deceased brother, Friso (who died after being buried in an avalanche).
He was the first male Dutch royal baby since the birth of Prince Alexander in 1851, and the first immediate male heir since Alexander's death in 1884. As of 2018, he is the second-youngest monarch in Europe after King Felipe VI of Spain.
His spouse, Queen Maxima, is from Argentina and is of Basque, Portuguese, and Italian ancestry. The couple has three daughters: Catharina-Amalia (The Princess of Orange, who is next in line to inherit the throne), Alexia, and Ariane.
He is a part-time pilot.
- Reid, David (March 18, 2017). Dutch king reveals he has been a KLM pilot for 21 years. CNBC. Retrieved March 23, 2019.