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Field Marshall
William, Count of Nassau-Siegen
Willem van Nassau.jpg
Count William of Nassau-Siegen (1592–1642); studio of Jan Antonisz. van Ravesteyn, ca. 1620–1630. Rijksmuseum Amsterdam.
Count of Nassau-Siegen
In office
1624–1642
Preceded by John VIII, Count of Nassau-Siegen
Succeeded by John Maurice, Prince of Nassau-Siegen
Governor of Emmerich
In office
1625–1626
Governor of Heusden
In office
1626–1637
Governor of Sluis
In office
1637–1642
Personal details
Born
Wilhelm Graf zu Nassau, Nassau, Katzenelnbogen, Vianden und Diez, Herr zu Beilstein

13 August 1592
Dillenburg, Germany
Died 17 July 1642(1642-07-17) (aged 49)
Orsoy, Germany
Cause of death Died of wounds
Resting place Heusden
Spouse Christiane of Erbach (1619–his death)
Children John William (1619–1623); Maurice Frederick (1621-1638); Mary Magdalene (1622–1647); Ernestine Juliane (1624–1634); Hollandine (1628–1629); Elisabeth Charlotte (1626–1694); Hollandine (1628–1629); Wilhelmine Christine (1629–1700)
Parents John VII, Count of Nassau-Siegen; Magdalene of Waldeck-Wildungen
Alma mater Heidelberg University
Occupation Soldier and statesman
Military service
Allegiance Hanseatic League; Republic of Venice; Dutch Republic
Years of service 1610–1642
Rank Field Marshall
Battles/wars

William, Count of Nassau-Siegen (born August 13, 1592 – died July 17, 1642), was an important soldier and leader from a noble family in Germany. He was a Count of Nassau-Siegen from 1624 until his death. William was a professional soldier who fought in many wars, including the Eighty Years War, which was a big conflict in the Netherlands. He became a high-ranking officer, a field marshal, in 1633 and served as a governor in several important towns.

William's Early Life

William was born in Dillenburg, Germany, on August 13, 1592. He was the fifth son of Count John VII 'the Middle' and his first wife, Countess Magdalene of Waldeck-Wildungen. He went to Heidelberg University to study. Later, he visited England with Otto of Hesse-Kassel.

William's Military Career

William started his military journey in 1610, fighting in his father's army.

Early Battles

Serving the Dutch Republic

After a 12-year peace period ended in 1621, William joined the Dutch States Army. He became a colonel in the infantry in 1622.

  • In 1625, he became the governor of Emmerich.
  • From 1626 to 1637, he was the governor of Heusden.

During the Siege of 's-Hertogenbosch in 1629, William led his troops. They started shelling the city on May 15. He also helped stop an invasion by another commander, Hendrik Graaf van den Bergh.

In 1629-1630, William and his troops were sent east of the Rhine river. Their presence forced Spanish troops to leave several towns, which then came under Dutch control.

Later Campaigns and Promotions

  • In 1632, William helped during the Siege of Maastricht. He captured several forts near Antwerp and Orsoy.
  • In April 1633, he became a Field marshal, taking over from his uncle, Count Ernest Casimir.

In 1636, William and his brother John Maurice captured the strong Schenkenschanz fort from the Spanish. The next year, in 1637, William became governor of Sluis. He also took part in the Siege of Breda.

Battle of Kallo and Final Years

In 1638, William was given an important task by Prince Frederick Henry of Orange. He was to take a levee (a raised bank) at Calloo to help with an attack on Antwerp. William captured some forts, but then he waited for more soldiers. He got some wrong information that a larger Spanish army was coming, so he quickly retreated. This led to the Battle of Kallo on June 17, where his forces were defeated. He lost over 2,000 men, including his son Maurice Frederick. This defeat caused Frederick Henry's entire plan to fail.

In 1641, during the Siege of Gennep, William was shot in the stomach. He later died from these wounds.

Count of Nassau-Siegen

William became the Count of Nassau-Siegen in 1624. This region was quite small.

Family Disputes and Inheritance

William's father, John VII, wanted to make sure the small county of Nassau-Siegen stayed together. He made a will in 1607 saying that only the oldest son would rule. Other children would get money or jobs instead.

However, William's second oldest brother, John 'the Younger', became Catholic in 1613. This was a problem because their family was Protestant. Their father changed his will to make sure the land stayed Protestant.

When John 'the Younger' joined the Spanish army (who were enemies of the Dutch Republic and the House of Nassau), and his older brother John Ernest died, their father had to decide if John 'the Younger' could still inherit.

John VII made a new will in 1621. He decided to split the small county into three parts for his three oldest sons: John 'the Younger', William, and John Maurice. The city of Siegen would be shared.

Segena famosum comitat nassouiae oppidum ca 1618
Siegen in 1617. On the left Siegen Castle.

After their father died in 1623, there was a big argument about the will. John 'the Younger' had an order from the Emperor saying he should get everything. He even brought soldiers into Siegen secretly to make sure he was accepted as the ruler.

In the end, John 'the Younger' got most of the inheritance. However, he gave William the Hilchenbach district, which included Ginsburg Castle. So, from then on, Nassau-Siegen had two governments: one in Siegen and one in Hilchenbach.

SI Ginsburg Totale 3
Ginsburg Castle.

During the Thirty Years' War, William and his brother John Maurice, who were fighting on the Protestant side, briefly took control of Siegen in 1632 with the help of Swedish soldiers. They divided the land as their father had originally planned. But by 1636, John 'the Younger' was back in charge of most of the county, except for Hilchenbach, which William kept.

Death and Succession

William died in Orsoy on July 17, 1642, from his wounds. He was buried in Heusden. He left his part of Nassau-Siegen to his half-brother, John Maurice.

William's Family

William married Countess Christiane of Erbach on January 17, 1619, at Siegen Castle. They had several children:

  • John William (1619–1623)
  • Maurice Frederick (1621–1638), who was a captain in the Dutch States Army and died in the Battle of Kallo.
  • Mary Magdalene (1622–1647), who married Count Philip Theodore of Waldeck-Eisenberg.
  • Ernestine Juliane (1624–1634)
  • Elisabeth Charlotte (1626–1694), who married George Frederick of Waldeck-Eisenberg.
  • Hollandine (1628–1629)
  • Wilhelmine Christine (1629–1700), who married Count Josias II of Waldeck-Wildungen.

Known Descendants

William has many famous descendants, including:

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