Grand Duchess Xenia Alexandrovna of Russia
Grand Duchess Xenia Alexandrovna of Russia (– 20 April 1960) was the elder daughter and fourth child of Tsar Alexander III of Russia and Empress Maria Feodorovna of Russia
(née Princess Dagmar of Denmark) and the sister of Emperor Nicholas II.
She married a cousin, Grand Duke Alexander Mikhailovich of Russia, with whom she had seven children.
She was the mother-in-law of Felix Yusupov and a cousin of Grand Duke Dmitri Pavlovich of Russia who, together, killed Grigori Rasputin, holy healer to her nephew, the haemophiliac Tsarevich Alexei Nikolaevich of Russia.
During her brother's reign she recorded in her diary and letters increasing concern about his rule.
After the fall of the monarchy in February 1917, she fled Russia, eventually settling in the United Kingdom.
Her grandson Prince Andrew Andreevich has been a head of the Romanov Family since December 2016.
Prince Nikita Romanov
Prince Nikita Nikitich Romanov( 13 May 1923 – 3 May 2007) was a British born, American historian and writer, author of a book about Ivan the Terrible.
He was a member of the Romanov family, a son of Prince Nikita Alexandrovich of Russia and a great nephew of Nicholas II of Russia, the last Tsar.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Prince Nikita Alexandrovich of Russia
Prince Nikita Alexandrovich of Russia( 13 January 1900 – 12 September 1974) was the third son and fourth 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.
Born in Imperial Russia during the reign of his uncle, Prince Nikita escaped the fate of many of his relatives who were killed by the Bolsheviks.
He left Russia in April 1919, at age nineteen.
In 1922 he married Countess Maria Vorontsova- Dashkova.
The couple had two children.
Abdul-Vahed Niyazov
' of Russia.
Prince Feodor Alexandrovich of Russia
Prince Feodor Alexandrovich of Russia (23 December 1898 – 30 November 1968) was the second son and third child of Grand Duke Alexander Mikhailovich of Russia and Grand Duchess Xenia Alexandrovna of Russia.
He was also a nephew of Nicholas II of Russia, the last Tsar.
Born and raised in Imperial Russia during the reign of his uncle Nicholas II, he followed a military career and entered the Corps of Pages during World War I. With the fall of the Russian monarchy, he escaped the fate of many of his relatives killed by the Bolsheviks fleeing to his parents estate in Crimea.
For a time, he was under house arrest there with a large group of family members.
They left Russia on 11 April 1919.
In exile, he settled in France where he married Princess Irina Pavlovna Paley, his distant cousin.
The couple divorced in 1936.
Afflicted with tuberculosis, Prince Feodor moved to England with his mother spending the years of World War II there.
After the war ended, he settled permanently in the south of France.
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.
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.
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.

Question: Who is Prince Feodor Alexandrovich Of Russia's maternal grandfather?
Answer: Alexander III of Russia