Heinrich XXIV, Prince Reuss of Greiz
Heinrich XXIV, Prince Reuss of Greiz( 20 March 187813 October 1927) was the last reigning Prince Reuss of Greiz from 1902 to 1918.
Then he became Head of the House Reuss of Greiz which became extinct at his death in 1927.
Anna Reuss of Köstritz
Princess Anna Elizabeth Reuss of Köstritz( 9 January 1837 in Dresden – 2 February 1907 in Wernigerode), was a princess of Reuss by birth and by marriage countess, and after 1890 princess, of Stolberg- Wernigerode.
Prince Heinrich XXXIII Reuss of Köstritz
Prince Heinrich XXXIII Reuss of Köstritz (26 July 1879 – 15 November 1942) was the son of Prince Heinrich VII Reuss of Köstritz and his wife Princess Marie Alexandrine of Saxe-Weimar-Eisenach.
Heinrich VII, Prince Reuss of Köstritz
Heinrich VII, Prince Reuss of Köstritz( 14 July 1825, Klipphausen – 2 May 1906, Trzebiechów) was a German diplomat.
Eleonore Reuss of Köstritz
Princess Eleonore Caroline Gasparine Louise Reuss-Köstritz (22 August 1860 – 12 September 1917) was Tsaritsa of Bulgaria and the second wife of Ferdinand I of Bulgaria.
Ferdinand I of Bulgaria
Ferdinand I (26 February 1861 – 10 September 1948), born Ferdinand Maximilian Karl Leopold Maria of Saxe-Coburg and Gotha, was the second monarch of the Third Bulgarian State, firstly as ruling prince ("knyaz") from 1887 to 1908, and later as king ("tsar") from 1908 until his abdication in 1918.
He was also an author, botanist, entomologist and philatelist.
Heinrich LXIII, Prince Reuss of Köstritz
Prince Heinrich LXIII Reuss of Köstritz( 18 June 1786, Berlin – 27 September 1841, Stonsdorf) was a member of the House of Reuss.
Princess Magdalena Reuss of Köstritz
Princess Magdalena Reuss of Köstritz (20 August 1920 - 10 October 2009) was the wife of Prince Hubertus of Prussia.
She was a member of the House of Reuss.
Prince Heinrich I Reuss of Köstritz
Prince Heinrich I Reuss of Köstritz( 8 October 191010 March 1982) was son of Prince Heinrich XXXIV Reuss of Köstritz and member of the House of Reuss.
Prince Heinrich VIII Reuss of Köstritz
Prince Heinrich VIII Reuss of Köstritz( born 30 August 1944) is a son of Prince Heinrich I Reuss of Köstritz, and is a member of the House of Reuss.

Question: When did Eleonore Reuss Of Köstritz's husband die?
Answer: 10 September 1948