Jacob Kettler

Jacob Kettler (German: Jakob von Kettler) (28 October 1610 – 1 January 1682) was a Baltic German Duke of the Duchy of Courland and Semigallia (1642–1682). Under his rule, the duchy reached its peak in wealth and engaged in colonization.

Jacob Kettler
Duke of Courland and Semigallia
Duke of Courland and Semigallia
Reign17 August 1642 – 1 January 1682
PredecessorFrederick Kettler
SuccessorFrederick Casimir Kettler
Born(1610-10-28)28 October 1610
Goldingen (Kuldīga)
Died1 January 1682(1682-01-01) (aged 71)
Mitau (Jelgava)
Burial
Ducal crypt in the Jelgava Palace
SpouseMargravine Louise Charlotte of Brandenburg
IssueLadislaus Louis Frederick Kettler
Frederick Casimir Kettler
Charles Jacob Kettler
Ferdinand Kettler
Alexander Kettler
Louise Elisabeth, Landgravine of Hesse-Homburg
Christina Sophia Kettler
Charlotte Sophia Kettler, Abbess of Herford
Maria Amalia, Landgravine of Hesse-Kassel
HouseKettler
FatherWilhelm Kettler
MotherDuchess Sophie of Prussia
ReligionLutheranism
Jacob Kettler's thaler, 1645.

Life and reign

Kettler was born in Goldingen, now known as Kuldīga. He was the son of Wilhelm Kettler and Princess Sophia of Prussia, a daughter of Albert Frederick, Duke of Prussia, and was a godson of King James I of England. While his father was exiled from the duchy, Jacob lived in the courts of Stettin and Berlin. He studied in Rostock and at the University of Leipzig and sympathized with the ideas of mercantilism. In 1633, he led a Curonian regiment in the Smolensk War between the Polish–Lithuanian Commonwealth and Russia. In 1634, he made a grand tour of Europe, visiting Paris, London, and Amsterdam, where he studied shipbuilding. In 1638, he became co-ruler of the duchy and in 1642 sole Duke of Courland.

Under Kettler's rule, the duchy traded with the Netherlands, Portugal, England, France, and other nations. He started large scale reforms of the duchy's economy, improved its agriculture, opened many manufactures and started a shipbuilding industry. During his reign, the Duchy became de facto independent of the Polish crown, because all contracts with foreign powers were signed as between independent states. After 1646, all customs administration of the Duchy also was in the Duke's power.

The Duchy was involved in colonisation. In 1651 Jacob sent a fleet to build Fort Jacob on the Gambia River, on an island that would later be known as St. Andrews. In 1654, he conquered Tobago with forces from the Das Wappen der Herzogin von Kurland, a double-decker ship armed with 45 cannons, carrying 25 officers, 124 Courlander soldiers, and eighty families of Latvian colonists. The colony on Tobago was named Neu Kurland ("New Courland"). In 1654, Duke Jacob was a party to the Treaty of Westminster.

The Duke was taken prisoner by the Swedes from 1658 to 1660, during the Northern Wars. Together with his family, he was held captive in Riga and later in Ivangorod. During this time, his colonies were attacked and lost and his fleet destroyed. After the war ended, he rebuilt the duchy's fleet and retook the island of Tobago from the Dutch. Some believe he also intended to colonize Australia, which had at that time been discovered and claimed by the Dutch, with whom he was at war. He supposedly had the blessing of Pope Innocent X. However, the pope soon died, and the new pope was unwilling to support the plan. For the rest of his reign he tried to reach a pre-war level of wealth but managed to do this only partly. The Duke died in Mitau (Jelgava) on 1 January 1682.

Legacy

Jacob Kettler is remembered as fair ruler who gave opportunities to the local Latvian peasants and even knew the Latvian language.[1]

Marriage and issue

Kettler married Margravine Louise Charlotte of Brandenburg (1617–1676), the daughter of George William, Elector of Brandenburg and had issue:[2]

NameBirthDeathNotes
Louise Elisabeth Kettler12 August 164616 December 1690married Frederick II, Landgrave of Hesse-Homburg; had issue; died aged 44
Ladislaus Louis Frederick Kettler14 December 164731 March 1648never married; died aged 3 months
Christina Sophia Kettler15 May 16499 June 1651never married; died aged 2
Frederick II Casimir Kettler6 July 165022 January 1698married (1) Countess Sophie Amalie of Nassau-Siegen; had issue (2) Margravine Elisabeth Sophie of Brandenburg; had issue; died aged 48
Charlotte Sophia Kettler17 September 16511 December 1728never married; became the Abbess in Herford; died aged 76
Maria Amalia Anna Kettler12 June 165316 June 1711married Charles I, Landgrave of Hesse-Kassel; had issue; died aged 58
Charles Jacob Kettler20 October 165429 December 1677never married; died aged 23
Ferdinand Kettler2 November 16554 May 1737married Princess Johanna Magdalene of Saxe-Weissenfels; no issue; died aged 81
Alexander Kettler16 October 16581686never married; died aged 28

Ancestry
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See also
  • Polish-Lithuanian Commonwealth

References
  1. "The ambitious journey of Duke Jacob Kettler". History & Culture Academy of Latgale. Retrieved 25 July 2019.
  2. Jakob Kettler, Duke of Kurland & Semgallen in: Our Royal, Titled, Noble, and Commoner Ancestors & Cousins (over 164,000 names) [retrieved 8 May 2015].
Preceded by
Friedrich Kettler		 Duke of Courland
1642–1682		 Succeeded by
Frederick Casimir Kettler
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