Ina Marie von Bassewitz
Princess Oskar of Prussia Countess of Ruppin
by Sandau, Berlin, 1915
Born	(1888-01-27)27 January 1888 Bristow, Grand Duchy of Mecklenburg-Schwerin, Empire of Germany
Died	17 September 1973(1973-09-17) (aged 85) Munich, Bavaria
Burial	19 September 1973 Burg Hohenzollern, Baden-Württemberg, West Germany
Spouse	Prince Oskar of Prussia (m. 1914–58; his death)
Issue	Prince Oskar Prince Burchard Princess Herzeleide Prince Wilhelm-Karl
House	Bassewitz
Father	Count Karl von Bassewitz-Levetzow
Mother	Countess Margarethe von der Schulenburg

Princess Oskar of Prussia, Countess of Ruppin (born Countess Ina-Marie Helene Adele Elise von Bassewitz, 27 January 1888 – 17 September 1973) was a German aristocrat and the wife of Prince Oskar of Prussia.

Countess Ina-Marie Helene Adele Elise von Bassewitz was born on 27 January 1888 at Bristow, Mecklenburg, Germany, as the second child and the youngest daughter of Count Karl Heinrich Ludwig von Bassewitz-Levetzow (1855-1921) and his wife, Countess Margarethe Cäcilie Luise Alexandrine Friederike Susette von der Schulenburg (1864-1940).^[1] Her brother was Count Werner von Bassewitz-Levetzow, a highly decorated Oberst der Reserve in the Wehrmacht during World War II.

On 31 July 1914 she married Prince Oskar of Prussia, son of Emperor Wilhelm II and his wife Augusta Viktoria of Schleswig-Holstein.^[2] Both the civil and religious ceremonies took place at Schloß Bellevue in Berlin, Prussia. Initially the union was considered morganatic, but on 3 November 1919 was decreed to be dynastic in accordance with the house laws of the royal House of Hohenzollern. Prior to her marriage, on 27 July 1914, Ina Marie had also gained the title Countess of Ruppin, and from 21 June 1920, was titled Princess of Prussia with the style Royal Highness. The couple had four children:

• Prince Oskar Wilhelm Karl Hans Kuno of Prussia (12 July 1915 Potsdam, Germany – 5 September 1939 Poland); died in World War II.
• Prince Burchard Friedrich Max Werner Georg of Prussia (8 January 1917 – 12 August 1988); married Countess Eleonore Fugger von Babenhausen on 30 January 1961, no issue.
• Princess Herzeleide-Ina-Marie Sophie Charlotte Else of Prussia (25 December 1918 – 22 March 1989); married Karl, Prince Biron von Kurland on 15 August 1938, with issue.
• Prince Wilhelm Karl Adalbert Erich Detloff of Prussia (20 January 1922 – 9 April 2007); married Armgard Else Helene von Veltheim on 1 March 1952, with issue. He was the last living grandchild of Emperor Wilhelm II; was the thirty-sixth Herrenmeister of the Order of Saint John (Bailiwick of Brandenburg).

Princess Ina-Marie of Prussia, Countess von Ruppin, died in Munich, Bavaria, on 17 September 1973. She was buried two days later, on 19 September 1973, in the Hohenzollern Castle, Baden-Württemberg, Germany.

• Marlene A. Eilers, Queen Victoria's Descendants (Baltimore, Maryland: Genealogical Publishing Co., 1987), page 156.
• C. Arnold McNaughton, The Book of Kings: A Royal Genealogy, in 3 volumes (London, U.K.: Garnstone Press, 1973), volume 1, page 60.

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