Beatrix (Beatrix Wilhelmina Armgard; born 31 January 1938) is the Queen Regnant of the Kingdom of the Netherlands comprising the Netherlands, Netherlands Antilles, and Aruba. She is the first daughter of Queen Juliana of the Netherlands and Prince Bernhard of Lippe-Biesterfeld. She studied law at Leiden University. In 1966, she married Claus von Amsberg, with whom she had three children: Prince Willem-Alexander (born 1967), Prince Friso (born 1968), and Prince Constantijn (born 1969). When her mother Juliana abdicated on 30 April 1980, Beatrix succeeded her as Queen of the Netherlands. She was widowed in 2002.