 These children were Baroness Elise Bentinck, Baroness Elisabeth van Hardenbroek and Jonkvrouwe Miek (Mary) de Jonge.As the Dutch constitution specified that Princess Juliana should be ready to succeed to the throne by the age of eighteen, her education proceeded at a faster pace than that of most children.After five years of primary education, the Princess received her secondary education (to pre-university level) from private tutors.