Princess Charlotte of Saxe-Meiningen
Princess Charlotte of Saxe- Meiningen( 11 September 1751, Frankfurt am Main, Free Imperial City of Frankfurt, Holy Roman Empire – 25 April 1827, Genoa, Kingdom of Sardinia) was a member of the House of Saxe- Meiningen and a Princess of Saxe- Meiningen by birth and a member of the House of Saxe- Gotha- Altenburg and Duchess consort of Saxe- Gotha- Altenburg through her marriage to Ernest II, Duke of Saxe- Gotha- Altenburg.
Princess Charlotte of Prussia
Princess Charlotte of Prussia (Viktoria Elisabeth Auguste Charlotte; 24 July 1860 – 1 October 1919) was Duchess Consort of Saxe-Meiningen as the wife of Bernhard III, the duchy's last ruler.
Born at the "Neues Palais" in Potsdam, she was the second child and eldest daughter of Prince Frederick of Prussia, a member of the House of Hohenzollern who became Crown Prince of Prussia in 1861 and German Emperor in 1888.
Through her mother Victoria, Princess Royal, Charlotte was the eldest granddaughter of the British monarch Queen Victoria and her consort Prince Albert of Saxe-Coburg and Gotha.
Princess Charlotte was a difficult child and indifferent student, with a nervous disposition.
Her relationship with her demanding mother was strained.
As she grew older, Charlotte developed a penchant for spreading gossip and causing trouble.
Eager to escape from parental control, at age seventeen, she married Prince Bernhard of Saxe-Meiningen in 1878.
Her husband's weak-willed personality had little effect on her.
Known for spreading gossip and her eccentric personality, Princess Charlotte enjoyed Berlin society while frequently leaving her only child, Princess Feodora, in the care of family members.
Charlotte and Feodora, in turn, also had a difficult relationship.
Charlotte's brother succeeded their father as Emperor Wilhelm II in 1888, increasing her social influence.
Throughout her brother's reign, she was known for her mischief-making, and spent her life in between bouts of illness, in frivolous and extravagant pursuits.
She became Duchess of Saxe-Meiningen in 1914, only for her husband to lose his title with the end of World War I in 1918.
Charlotte died the following year of a heart attack in Baden-Baden.
She had suffered from a lifetime of ill-health.
Most historians now believe she had porphyria, a genetic disease that afflicted other members of the British Royal Family.
Princess Feodora of Hohenlohe-Langenburg
Princess Feodora of Hohenlohe- Langenburg( Feodora Victoria Adelheid; 7 July 1839 – 10 February 1872) was a daughter of Ernst I, Prince of Hohenlohe- Langenburg and Princess Feodora of Leiningen.
By her marriage to Georg of Saxe- Meiningen, she would become Duchess of Saxe- Meiningen upon his accession to the ducal throne in 1866.
Friedrich Wilhelm, Duke of Saxe-Meiningen
Friedrich Wilhelm, Duke of Saxe- Meiningen( 16 February 1679 in Ichtershausen – 10 March 1746 in Meiningen), was a duke of Saxe- Meiningen.
Princess Louise Eleonore of Hohenlohe-Langenburg
Princess Luise Eleonore of Hohenlohe- Langenburg( 11 August 1763, in Langenburg – 30 April 1837, in Meiningen) was a German regent.
She was duchess of Saxe- Meiningen by marriage to George I, Duke of Saxe- Meiningen, and Regent of Saxe- Meiningen during the minority of her son from 1803 to 1821.
Bernhard III, Duke of Saxe-Meiningen
Bernhard III, Duke of Saxe- Meiningen( 1 April 1851 – 16 January 1928), was the last reigning duke of Saxe- Meiningen.
Princess Feodora of Saxe-Meiningen (1890–1972)
Princess Feodora of Saxe-Meiningen
(Feodora Karola Charlotte Marie Adelheid Auguste Mathilde; 29 May 1890 – 12 March 1972) was the eldest child of Prince Friedrich Johann of Saxe-Meiningen, a younger son of Georg II, Duke of Saxe-Meiningen, and Countess Adelaide of Lippe-Biesterfeld, a daughter of Ernst, Count of Lippe-Biesterfeld.
By marriage, she was known as Grand Duchess of Saxe-Weimar-Eisenach.
Georg, Prince of Saxe-Meiningen
Georg, Prince of Saxe- Meiningen( 11 October 1892 – 6 January 1946) was the head of the house of Saxe- Meiningen from 1941 until his death.
Princess Feodora of Saxe-Meiningen
Princess Feodora of Saxe-Meiningen (Feodora Viktoria Auguste Marie Marianne; 12 May 1879 – 26 August 1945) was born at Potsdam, the only child of Bernhard III, Duke of Saxe-Meiningen, and his wife, Princess Charlotte of Prussia (the eldest daughter of Frederick III, German Emperor, and Victoria, Princess Royal).
Feodora was the first great-grandchild of Queen Victoria.
Bernhard, Prince of Saxe-Meiningen
Bernhard, Prince of Saxe- Meiningen( 30 June 1901 – 4 October 1984) was the head of the House of Saxe- Meiningen from 1946 until his death.

Question: What is the cause of death of Princess Feodora Of Saxe-Meiningen's mother?
Answer: heart attack