Prince of Orange in the context of "Heir apparent"

Maurice of Orange (Dutch: Maurits van Oranje; 14 November 1567 – 23 April 1625) was stadtholder of all the provinces of the Dutch Republic—except Friesland—from 1585 until his death. Prior to inheriting the title Prince of Orange from his elder half-brother, Philip William, in 1618, he was known as Maurice of Nassau.

Born in Dillenburg, Nassau, Maurice was educated at the Heidelberg University and the University of Leiden. He succeeded his father, William the Silent, as stadtholder of Holland and Zeeland in 1585, and later assumed the same position in Utrecht, Guelders, and Overijssel (1590), and Groningen (1620). As Captain-General and Admiral of the Union, Maurice reorganized the Dutch States Army, transforming the Dutch Revolt into a disciplined and effective military campaign.

An heir apparent is a person who is first in the order of succession and cannot be displaced from inheriting by the birth of another person. A person who is first in the current order of succession but could be displaced by the birth of a more eligible heir is known as an heir presumptive.

Today these terms most commonly describe heirs to hereditary titles (e.g. titles of nobility) or offices, especially when only inheritable by a single person. Most monarchies refer to the heir apparent of their thrones with the descriptive term of crown prince or crown princess, but they may also be accorded with a more specific substantive title: such as Prince of Orange in the Netherlands, Duke of Brabant in Belgium, Prince of Asturias in Spain (also granted to heirs presumptive), or the Prince of Wales in England and Wales; former titles include Dauphin in the Kingdom of France, and Tsesarevich in Imperial Russia.

William III and II (William Henry; Dutch: Willem Hendrik; 4 November 1650 – 8 March 1702), also known as William of Orange, was the sovereign Prince of Orange from birth, Stadtholder of Holland, Zeeland, Utrecht, Guelders, and Overijssel in the Dutch Republic from 1672, and King of England, Ireland, and Scotland from 1689 until his death in 1702. He ruled England, Scotland, and Ireland with his wife, Queen Mary II, and their joint reign is known as that of William and Mary.

William was the only child of William II, Prince of Orange, and Mary, Princess Royal, the daughter of King Charles I of England, Scotland, and Ireland. His father died before his birth, making William III the prince of Orange from birth. In 1677, he married his first cousin Mary, the elder daughter of his maternal uncle James, Duke of York (later King James II).

Philip William, Prince of Orange (19 December 1554 in Buren, Gelderland – 20 February 1618) was the eldest son of William the Silent by his first wife Anna van Egmont. He became Prince of Orange in 1584 and Knight of the Golden Fleece in 1599.

William the Silent or William the Taciturn (Dutch: Willem de Zwijger; 24 April 1533 – 10 July 1584), more commonly known in the Netherlands as William of Orange (Dutch: Willem van Oranje), was the leader of the Dutch revolt against the Spanish Habsburgs that set off the Eighty Years' War (1568–1648) and resulted in the formal independence of the United Provinces in 1648. Born into the House of Nassau, he became Prince of Orange in 1544 and is thereby the founder of the Orange-Nassau branch and the ancestor of the monarchy of the Netherlands. In the Netherlands, he is also known as Father of the Fatherland (Latin: Pater Patriae; Dutch: Vader des Vaderlands).

A wealthy nobleman, William originally served the Habsburgs as a member of the court of Margaret of Parma, governor of the Spanish Netherlands. Unhappy with the centralisation of political power away from the local estates and with the Spanish persecution of Dutch Protestants, William joined the Dutch uprising and turned against his former masters. The most influential and politically capable of the rebels, he led the Dutch to several successes in the fight against the Spanish. Declared an outlaw by the Spanish king in 1580, he was assassinated by Balthasar Gérard in Delft in 1584.

Frederick Henry (Dutch: Frederik Hendrik; 29 January 1584 – 14 March 1647) was the sovereign prince of Orange and stadtholder of Holland, Zeeland, Utrecht, Guelders, and Overijssel in the Dutch Republic from his older half-brother's death on 23 April 1625 until his death on 14 March 1647. In the last seven years of his life, he was also the stadtholder of Groningen (1640-1647).

As the leading soldier in the Dutch wars against Spain, his main achievement was the successful Siege of 's-Hertogenbosch in 1629. It was the main Spanish base and a well-fortified city protected by an experienced Spanish garrison and by formidable water defenses. His strategy was the successful neutralization of the threat of inundation of the area around 's-Hertogenbosch' and his capture of the Spanish storehouse at Wesel. The successful sieges under his command earned him the epithet ‘city forcer’ (Dutch: stedendwinger). He was the paternal grandfather of William III, who later became King of England, Scotland & Ireland, through his only surviving son, William II.

Willem-Alexander (Dutch: [ˈʋɪləm aːlɛkˈsɑndər]; Willem-Alexander Claus George Ferdinand; born 27 April 1967) is King of the Netherlands.

Willem-Alexander was born in Utrecht during the reign of his maternal grandmother, Queen Juliana, as the eldest child of Princess Beatrix (later Queen) and Prince Claus. He became Prince of Orange as heir apparent upon his mother's accession on 30 April 1980. He went to public primary and secondary schools in the Netherlands, and an international sixth-form college in Wales. He served in the Royal Netherlands Navy, and studied history at Leiden University. He married Máxima Zorreguieta Cerruti in 2002, and they have three daughters: Catharina-Amalia, Alexia, and Ariane. Willem-Alexander succeeded his mother as monarch upon her abdication on 30 April 2013. He is the first man to hold this position since the death of his great-great-grandfather William III in 1890, as the intervening three monarchs—his great-grandmother Wilhelmina, his grandmother Juliana and his mother Beatrix—had all been women.