Frederick Casimir Kettler

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Friedrich Casimir Kettler
Duke of Courland and Semigallia
Fridrihs kazimirs.jpg
Reign 1682 - 1698
Predecessor Jacob Kettler
Successor Frederick Wilhelm Kettler
Born (1650-07-06)6 July 1650
Died 22 January 1698(1698-01-22) (aged 47)
Burial Ducal crypt in Jelgava Palace.
Spouse Sophie Amalie of Nassau-Siegen
Elisabeth Sophie of Brandenburg
Issue Frederick Wilhelm Kettler
House House of Kettler
Father Jacob Kettler
Mother Louise Charlotte of Brandenburg
Religion Lutheranism

Frederick Casimir Kettler (German: Friedrich Casimir Kettler; 6 July 1650 – 22 January 1698) was Duke of Courland and Semigallia from 1682 to 1698. Frederick Casimir was the son of Jacob Kettler and Louise Charlotte of Brandenburg. In his reign the Duchy lost its geopolitical position and became Sweden, Prussia and Russia's territorial subject of interests.


Frederick Casimir Kettler studied law in Germany and visited a number of European courts. In 1673 he was in the Dutch military service. On 5 October 1675, in the Hague, Frederick Casimir married princess Sophie Amalie of Nassau-Siegen and returned home. After his father died Frederick Casimir became the Duke of Courland and Semigallia and vigorously resorted to public affairs. In 1684 the duke's book printer George Radeckis in Jelgava became the first person to print books in the Latvian language. His efforts to restore the holdings were stopped by the power of Sweden, which at that time prevailed in northern Europe. However, Friedrich Casimir founded splendid court life according to the best Western models.

In 1688 Sophie Amalie died. In 1691 Frederick Casimir celebrated a large-scale wedding with Elisabeth Sophie of Brandenburg.

During the reign of Frederick Casimir, trade and industry of the duchy started to decay. In 1693 the Tobago colony was sold to England. In the spring of 1697, Friedrich Casimir received a grand delegation from Russia, including the new Tsar Peter I, on whom the Jelgava Palace and its court left a great impression. The duchy and Russia held diplomatic talks on mutual cooperation against the Swedes, but in the next winter of 1698, Frederick Casimir died at the age of 47. His minor son Frederick Wilhelm became the next duke.


From 1st marriage:

From 2nd marriage:


Preceded by
Jacob Kettler
Duke of Courland
Succeeded by
Frederick Wilhelm, Duke of Courland