Prince Friedrich Georg Wilhelm Christoph of Prussia (December 19, 1911–April 20, 1966), was the son of Crown Prince Wilhelm of Germany and Cecilie, Duchess of Mecklenburg-Schwerin. December 19 is the 353rd day of the year (354th in leap years) in the Gregorian calendar. ... 1911 (MCMXI) was a common year starting on Sunday (click on link for calendar). ... April 20 is the 110th day of the year in the Gregorian calendar (111th in leap years). ... 1966 (MCMLXVI) was a common year starting on Saturday (the link is to a full 1966 calendar). ... Crown Prince Wilhelm of Germany and Prussia (6 May 1882 - 20 July 1951), Friedrich Wilhelm Viktor August Ernst Kronprinz von Preussen, was born 6 May 1882 at Marmorpalais, Potsdam, Germany. ...

On July 30, 1945, he married Lady Brigid Katherine Rachel Guinness, daughter of Rupert Guinness, 2nd Earl of Iveagh, at Little Hadham, Hertfordshire. They had five children: July 30 is the 211th day (212th in leap years) of the year in the Gregorian Calendar, with 154 days remaining. ... 1945 (MCMXLV) was a common year starting on Monday (the link is to a full 1945 calendar). ... Little Hadham is a village in the Hertfordshire countryside. ... Hertfordshire (pronounced Hartfordshire and abbreviated as Herts) is an inland county in the United Kingdom, officially part of the East of England Government region. ...

• Prince Frederick Nicholas (b. 3 May 1946), married Hon. Victoria Lucinda Mancroft (daughter of Stormont Mancroft, 2nd Baron Mancroft) and had issue.
• Prince William Andrew (b. 14 November 1947), married Alexandra Blahova and had issue.
• Princess Victoria Marina Cecilie (b. 22 February 1952), married Philippe Alphonse Achache and had issue.
• Prince Rupert Alexander Frederick (b. 28 April 1955), married Ziba Rastegar-Javaheri and had issue.
• Princess Antonia Elizabeth Brigid Luise (b. 28 April 1955), married Arthur Charles Valerian Wellesley, Marquess of Douro and had issue.

Prince Friedrich died on 20 April 1966 at Reinhartshausen, Germany after drowning in the Rhine. May 3 is the 123rd day of the year in the Gregorian calendar (124th in leap years). ... 1946 (MCMXLVI) was a common year starting on Tuesday. ... November 14 is the 318th day of the year (319th in leap years) in the Gregorian Calendar, with 47 days remaining. ... 1947 (MCMXLVII) was a common year starting on Wednesday (the link is to a full 1947 calendar). ... February 22 is the 53rd day of every year in the Gregorian Calendar. ... 1952 (MCMLII) was a Leap year starting on Tuesday (link will take you to calendar). ... April 28 is the 118th day of the year (119th in leap years) in the Gregorian Calendar, with 247 days remaining. ... 1955 (MCMLV) was a common year starting on Saturday of the Gregorian calendar. ... Princess Antonia of Prussia, Marchioness of Douro (b. ... Arthur Charles Valerian Wellesley, Marquess of Douro (born August 19, 1945) is the son and heir of Arthur Valerian Wellesley, 8th Duke of Wellington. ... April 20 is the 110th day of the year in the Gregorian calendar (111th in leap years). ... At 1,320 kilometres (820 miles) and an average discharge of more than 2,000 cubic meters per second, the Rhine (German Rhein, French Rhin, Dutch Rijn, Romansch: Rein, Italian: Reno) is one of the longest and most important rivers in Europe. ...