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Frederick William I, Duke of Schleswig-Holstein-Sonderburg-Beck

Duke of Schleswig-Holstein-Sonderburg-Beck
The basics
Date of birth
Date of death Jun 16, 1719 Francavilla di Sicilia, Province of Messina, Sicily, Italy
Father: August, Duke of Schleswig-Holstein-Sonderburg-Beck
The details

Frederick William I, Duke of Duke of Schleswig-Holstein-Sonderburg-Beck (German: Friedrich Wilhelm I. von Schleswig-Holstein-Sonderburg-Beck; 2 May 1682 – 16 June 1719) was a son of Duke August and his wife, Philippa Louisa of Lippe-Buckburg. He succeeded his father as Duke of Beck in 1689.

He converted to Roman Catholicism and joined the Army of the Holy Roman Empire. He died of his wounds in the Battle of Francavilla in Sicily in 1719.

Since he had no male heir, he was succeeded as Duke of Beck by his uncle Frederick Louis.

Marriage and issue

In 1708, he married Marie Antoinette (15.10.1692-1762), the daughter of Francis Anthony Maximilian Emmanuel Isnardi di Castello, 5th Marquess of Caraglio and 6th Count of Sanfré, in Piedmont, and wife Maria Magdalene Grundemann von Falkenberg, heiress of Sanfré and Strevi. They had two daughters:

  • Maria Ana Leopoldina (b. Linz, Vienna, 2.8.1717 - Torino, 7.2.1789). She was married in Vienna on 4.8.1735 to D. Manoel de Souza (21.7.1703 - in a fire, in prison, in Lisbon, 1759), Lord of Calhariz, in Portugal. Their son, D. Alexandre de Sousa Holstein (Lisbon 4.12.1751 - 13.12.1803) was Lord of Calhariz, count of Sanfré, Portuguese ambassador do the courts of Kopenhagen, Berlin and Rome.
  • Johanna Amalia (b. 1719- d. 1774) Married in 1740 Emanuel Silva Tarouca


Frederick William I, Duke of Schleswig-Holstein-Sonderburg-Beck
House of Oldenburg
Born: 2 May 1682 Died: 16 June 1719
Preceded by
Duke of Schleswig-Holstein-Sonderburg-Beck
Succeeded by
Frederick Louis

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