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The Crown princess presents her fourth son Frederick, 1911

Prince Friedrich Georg Wilhelm Christoph of Prussia (19 December 1911 – 20 April 1966), a.k.a. in England as "Mr. Friedrich von Preussen",[1] was the son of Crown Prince Wilhelm of Germany and Duchess Cecilie of Mecklenburg-Schwerin.

On 30 July 1945, he married Lady Brigid Katherine Rachel Guinness, daughter of Rupert Guinness, 2nd Earl of Iveagh, at Little Hadham, Hertfordshire. They had five children:

  • Prince Frederick Nicholas (in German, Friedrich Nikolaus, born 3 May 1946), married the Hon. Victoria Lucinda Mancroft (daughter of Stormont Mancroft, 2nd Baron Mancroft) and had issue.
  • Prince William Andrew (in German, Wilhelm Andreas, born 14 November 1947), married Alexandra Blahová, daughter of Frantisek Blahová and wife Vlasta Dokupilová and formerly married on 17 December 1972 to Tom Aisbett, and had issue.
  • Princess Victoria Marina Cecilie (in German, Viktoria Marina Cecilie, born 22 February 1952), married Philippe Alphonse Achache, son of Jean Achache and wife Jacqueline Andrieu, and had issue.
  • Prince Rupert Alexander Frederick (in German, Rupprecht Alexander Friedrich, born 28 April 1955), married Ziba Rastegar-Javaheri, daughter of Morteza Rastegar-Javaheri and wife Rabeéh Baghaii-Kermani, and had issue.
  • Princess Antonia Elizabeth Brigid Louise (in German, Antonia Elisabeth Birgitta Luise, born 28 April 1955), married Arthur Charles Valerian Wellesley, Marquess of Douro and had issue.

Being a descendant of Sophia of Hanover and having rights under the Act of Settlement 1701, as amended by a 1705 Act, Prince Frederick was naturalised as a British citizen in October 1947 under the name Mr. Friedrich Von Preussen. This naturalisation was controversial to some, and his status and a subsequent claim for compensation was debated in parliament and the law courts until 1961.[2] It is therefore doubtful whether he should have been styled in England as a Prince after 1947 (as distinct from any naming practices in Germany where titles are incorporated into names). In turn, his children's claims to be princes or princesses, and their usage of royal titles, is open to question.[3]

Prince Friedrich died in 1966 at Reinhartshausen, Germany after drowning in the Rhine.



  1. ^ See Commons debate herein.
  2. ^ Commons Debate of 19 October 1961
  3. ^ Their great-grandfather Wilhelm II had abdicated on 28 November 1918, after all of his six sons had already abdicated their claims to rule Prussia or Germany.


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