Grand Duke Andrei Vladimirovich of Russia
Grand Duke Andrei Vladimirovich of Russia ((14 May 1879 – 30 October 1956) was a son of Grand Duke Vladimir Alexandrovich of Russia, a grandson of Emperor Alexander II and a first cousin of Nicholas II, Russia’s last Tsar.
In 1900, he began an affair with the famous ballerina Mathilde Kschessinska, becoming the third grand duke to fall for her.
Grand Duke Andrei followed a military career and graduated from the Alexandrovskaya Military Law academy in 1905.
He occupied different military positions during the reign of Tsar Nicholas II, but with no particular distinction.
He became senator in 1911 and was appointed Major General in the Russian Army in 1915.
He took part in World War I, but was away from real combat spending most of the conflict at Russia's headquarters or in idle time in Saint Petersburg.
In February 1917, shortly before the fall of the Russian monarchy, Grand Duke Andrei left Saint Petersburg to join his mother in Kislovodsk.
He remained in the Caucasus for the next three years.
After the October Revolution he was briefly arrested along with his brother, Grand Duke Boris, but they escaped.
He departed revolutionary Russia in March 1920, being the last grand duke to leave for exile.
In 1921, he married his longtime mistress Mathilde Kschessinska and recognized her son as his.
The couple lived in the South of France until 1929 when they moved permanently to Paris, where Kschessinska opened a ballet school.
After World War II, Grand Duke Andrei lived under reduced circumstances.
Until his death at age 77, he was the last surviving Russian grand duke born in Imperial Russia.
Grand Duke Alexei Alexandrovich of Russia
Grand Duke Alexei Alexandrovich of Russia,(Russian: Алексей Александрович; 14 January 1850 (2 January O.S.) in St. Petersburg – 14 November 1908 in Paris) was the fifth child and the fourth son of Alexander II of Russia and his first wife Maria Alexandrovna
(Marie of Hesse).
Chosen for a naval career, Alexei Alexandrovich started his military training at the age of 7.
By the age of 20 he had been appointed lieutenant of the Imperial Russian Navy and had visited all Russia's European military ports.
In 1871, he was sent as a goodwill ambassador to the United States and Japan.
In 1883 he was appointed general-admiral.
He had a significant contribution in the equipment of the Russian navy with new ships and in modernizing the naval ports.
However, after the Russian defeat in the Battle of Tsushima in 1905, he was relieved of his command.
He died in Paris in 1908.
Irina Paley
Princess Irina Pavlovna Paley( 21 December 1903 – 15 November 1990) was the daughter of Grand Duke Paul Alexandrovich of Russia and his second wife, Olga Valerianovna Karnovich.
Aleksey Belevsky-Zhukovsky
Count Alexei Alexeevich Belevsky- Zhukovsky( 26 November 1871, Salzburg – c. 1931 Caucasus) was the son of Grand Duke Alexei Alexandrovich of Russia and Alexandra Vasilievna, Baroness Seggiano.
He was also, being the son of Grand Duke Alexei, a grandson of Alexander II of Russia.
Maria Alexandrovna (Marie of Hesse)
Maria Alexandrovna , born Princess Marie of Hesse and by Rhine (8 August 1824 – 3 June 1880) was Empress of Russia as the first wife of Emperor Alexander II.
She was the mother of Emperor Alexander III and paternal grandmother of Nicholas II and Grand Duke Dmitri Pavlovich of Russia, one of the murderers of Rasputin.
She was a daughter of Ludwig II, Grand Duke of Hesse, and Princess Wilhelmine of Baden.
Marie was raised in austerity but was well educated by her mother, who took personal charge of her education but died when Marie was still very young.
She was only fourteen years old when the Tsarevich Alexander Nikolaevich, later Tsar Alexander II of Russia, fell in love with her while he was traveling to Western Europe.
She arrived in Russia in September 1840, converted to the Orthodox Church, took the title of Grand Duchess of Russia and traded the name Marie for Maria Alexandrovna.
She married Alexander on 16 April 1841.
The couple had eight children: two daughters and six sons.
For fourteen years (1840–1855), she was Tsarevna, the wife of the heir of the Russian throne.
She became the Russian Empress consort after the death of her father-in-law, Tsar Nicholas I.
Maria Alexandrovna learned the Russian language quickly; she was pious and identified with her adopted country.
She did not enjoy court life or the duties of representation as she was shy and of a withdrawn nature.
As a consequence she was not popular.
She took a more focused interest in charitable activities after the death of her mother-in-law the Dowager Empress Alexandra Feodorovna in 1860.
Maria Alexandrovna was particularly active in the field of female education, establishing Russia's first all female schools.
She organized the Russian Red Cross and expanded its activities during the Russo-Turkish War of 1877–78.
She was deeply affected by the death of her eldest son the Tsarevich Nicholas Alexandrovich in 1865.
By then, her fragile constitution was undermined by her numerous pregnancies and by tuberculosis which afflicted her since 1863.
To avoid the harsh Russian winters, she spent long sojourns in the Crimea and in southern Europe.
During many summers she visited her family in Jugenheim, where she had spent her childhood.
Her marriage to Tsar Alexander II started as a love match and it was happy for some years, but Alexander II had many affairs and in 1866 he fell in love with Catherine Dolgorukova and had four children with his mistress.
Maria Alexandrovna was treated with respect by her philanderer husband
and she was much loved by her surviving children.
After a long illness, she died in 1880.
The Mariinsky Theatre in Saint Petersburg, the city of Mariinsk in Kemerovo Oblast, and the city of Mariehamn in Åland are named after her.
Princess Olga Paley
Princess Olga Valerianovna Paley( 2 December 1865 – 2 November 1929) was the morganatic second wife of Grand Duke Paul Alexandrovich of Russia.
Grand Duke Sergei Alexandrovich of Russia
Grand Duke Sergei Alexandrovich of Russia ("Сергей Александрович"; 11 May 1857 – 17 February 1905) was the fifth son and seventh child of Emperor Alexander II of Russia.
He was an influential figure during the reigns of his brother Emperor Alexander III of Russia and his nephew Emperor Nicholas II, who was also his brother in law through Sergei's marriage to Elizabeth, the sister of Tsarina Alexandra.
Grand Duke Sergei's education gave him lifelong interests in culture and the arts.
Like all male members of the Romanov dynasty, he followed a military career, and he fought in the Russo-Turkish War of 1877–78, receiving the Order of St George for courage and bravery in action.
In 1882, his brother, Tsar Alexander III, appointed him Commander of the 1st Battalion Preobrazhensky Life Guard Regiment, a position he held until 1891.
In 1889, Grand Duke Sergei was promoted to the rank of Major General.
In 1884, Sergei married Princess Elisabeth of Hesse and by Rhine, a granddaughter of Queen Victoria.
Their marriage remained childless, but they became the guardians of the two children of his brother, Grand Duke Paul Alexandrovich of Russia: Grand Duchess Maria, and Grand Duke Dmitri.
Grand Duke Sergei Alexandrovich and his wife promoted the marriage of Sergei's nephew, Tsar NicholasII, with Princess Alix of Hesse, Elizabeth's youngest sister.
Between 1891 and 1905, Grand Duke Sergei served as Governor General of Moscow.
His reputation was tarnished as he was partially blamed for the Khodynka Tragedy, which, during the festivities following the coronation of Emperor NicholasII, resulted in thousands of deaths.
As a Governor of Moscow, Grand Duke Sergei was responsible for the expulsion of Moscow's 20,000 Jews at the start of his tenure, and he repressed a student movement to prevent the spread of revolutionary ideas.
His conservative policies, extreme even by contemporary standards, made him a polarizing figure, and he was regarded as a reactionary.
In 1894 Grand Duke Sergei was made a member of the State Council.
In 1896 he was promoted to Lieutenant General and appointed as Commander of Moscow military district.
After thirteen years of service, Grand Duke Sergei resigned from the Governorship on 1 January 1905.
Targeted by the SR Combat Organization, he was assassinated by a terrorist bomb at the Kremlin.
Prince Dmitri Alexandrovich of Russia
Prince Dmitri Alexandrovich of Russia( 15 August 1901 – 7 July 1980) was the fourth son and fifth child of Grand Duke Alexander Mikhailovich of Russia and Grand Duchess Xenia Alexandrovna of Russia.
He was a nephew of Tsar Nicholas II of Russia.
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Grand Duke Alexei Mikhailovich of Russia
Grand Duke Alexei Mikhailovich of Russia( Russian: Алексей Михайлович)( 28 December 1875 – 2 March 1895) was the sixth son and youngest child of Grand Duke Michael Nicolaievich of Russia and a first cousin of Alexander III of Russia.
He was destined to follow a career in the Russian Navy, but he died in his youth of tuberculosis.

Question: What is the cause of death of Grand Duke Alexei Alexandrovich Of Russia's mother?
Answer: tuberculosis