Title: Grand Duke Nicholas Mikhailovich of Russia
Content:  Grand Duke Nicholas Mikhailovich of Russia (Великий князь Никола́й Миха́йлович; 26 April [ O.S. 14 April] 1859 – 28 January 1919) was the eldest son of Grand Duke Michael Nikolaevich of Russia and a first cousin of Alexander III.
Title: Grand Duke Nicholas Konstantinovich of Russia
Content:  Grand Duke Nicholas Constantinovich of Russia (14 February 1850 – 26 January 1918) was the first-born son of Grand Duke Konstantin Nikolayevich and Grand Duchess Alexandra Iosifovna of Russia and a grandson of Nicholas I of Russia.
Title: Grand Duke Nicholas Nikolaevich of Russia (1856–1929)
Content:  A very tall man (1.98m / 6' 6"), Nicholas, named after his paternal grandfather, the emperor, was born as the eldest son to Grand Duke Nicholas Nicolaevich of Russia (1831–1891) and Alexandra Petrovna of Oldenburg (1838–1900) on 18 November 1856. His father was the sixth child and third son born to Nicholas I of Russia and his Empress consort Alexandra Fedorovna of Prussia (1798–1860). Alexandra Fedorovna was a daughter of Frederick William III of Prussia and Louise of Mecklenburg-Strelitz. Nicholas's mother, his father's first cousin's daughter, was a daughter of Duke Konstantin Peter of Oldenburg (1812–1881) and Princess Therese of Nassau (1815–1871). His maternal grandfather was a son of Duke George of Oldenburg and Grand Duchess Catherine Pavlovna of Russia, daughter of Paul I of Russia and Maria Fedorovna of Württemberg. (Catherine was later 
Title: Grand Duke Nicholas Nikolaevich of Russia (1831–1891)
Content:  Grand Duke Nicholas Nikolaevich of Russia (Великий князь Николай Николаевич; 8 August 1831 –  25 April 1891) was the third son and sixth child of Tsar Nicholas I of Russia and Alexandra Feodorovna. He may also be referred to as Nicholas Nikolaevich the Elder to tell him apart from his son, Grand Duke Nicholas Nikolaevich of Russia (1856–1929). Trained for the military, as a Field Marshal he commanded the Russian army of the Danube in the Russo-Turkish War, 1877–1878.
Title: Nicholas II of Russia
Content:  Grand Duke Nicholas was born on 1868, in the Alexander Palace in Tsarskoye Selo south of Saint Petersburg, during the reign of his grandfather Emperor Alexander II. He was the eldest child of then-Tsesarevich Alexander Alexandrovich and his wife, Tsesarevna Maria Feodorovna (née Princess Dagmar of Denmark). Grand Duke Nicholas' father was heir apparent to the Russian throne as the second but eldest surviving son of Emperor Alexander II of Russia. He had five younger siblings: Alexander (1869–1870), George (1871–1899), Xenia (1875–1960), Michael (1878–1918) and Olga (1882–1960). Nicholas often referred to his father nostalgically in letters after Alexander's death in 
Title: Nicholas Alexandrovich, Tsesarevich of Russia
Content:  Grand Duke Nicholas was born on 1843, in the Alexander Palace in Tsarskoye Selo south of central Saint Petersburg, during the reign of his grandfather, Emperor Nicholas I. Nicknamed "Nixa", he was the eldest son of the Tsesarevich Alexander Nikolaevich, eldest son of Emperor Nicholas I, and the Tsesarevna Maria Alexandrovna of Russia. In 1855, his paternal grandfather died, and his father succeeded to the throne as Emperor Alexander II. Nicholas was extremely well-educated and intelligent. His paternal uncle Grand Duke Konstantin called him "the crown of perfection." His history teacher said, “If I succeeded in forming a student equal to Nikolai Alexandrovich once in ten years, I’d think I’d have fulfilled my duties." Nicholas had a close relationship with his younger brother, Grand Duke Alexander. He called Alexander "Pug." On his deathbed, he told his father, “Papa, take care of Sasha, he is such an honest, good man."
Title: Grand Duke Alexander Mikhailovich of Russia
Content:  Grand Duke Alexander Mikhailovich of Russia (Александр Михайлович Aleksandr Mikhailovich; 13 April 1866 – 26 February 1933) was a dynast of the Russian Empire, a naval officer, an author, explorer, the brother-in-law of Emperor Nicholas II and advisor to him.
Title: Prince Nicholas Romanov
Content:  Prince Nicholas was born in Cap d'Antibes near Antibes, France, the eldest son of Prince Roman Petrovich and his wife Princess Praskovia Dmitrievna (née Countess Sheremeteva). Prince Nicholas had a younger brother, Prince Dimitri Romanovich. Their father Prince Roman Petrovich was the only son of Grand Duke Peter Nicolaievich and Grand Duchess Militsa Nikolaievna (née Princess of Montenegro). His grandfather was the younger son of Grand Duke Nicholas Nikolaevich and Grand Duchess Alexandra Petrovna (née Duchess of Oldenburg). His great grandfather Nicholas Nikolaevich was a younger son of Emperor Nicholas I of Russia and Empress Alexandra Fyodorovna (née Princess Charlotte of Prussia) and founded the Nikolaevichi branch of the Russian Imperial Family. Prince Nicholas was brought up in Cap d'Antibes with his family still using the Julian calendar and he spoke both fluent Russian and French from his childhood on. He was brought up in a Russian environment with his local church having a Russian priest and his family employing Russian staff and a Russian nanny.
Title: Grand Duke Nicholas Nikolaevich of Russia (1856–1929)
Content:  Grand Duke Nicholas Nikolaevich of Russia (Russian: Николай Николаевич Романов (младший – the younger); 18 November 1856 – 5 January 1929) was a Russian general in World War I (1914–1918). The son of Grand Duke Nicholas Nikolaevich of Russia (1831–1891), and a grandson of Emperor Nicholas I of Russia, he was commander in chief of the Imperial Russian Army units on the main front in the first year of the war, during the reign of his first cousin once removed, Nicholas II. Although held in high regard by Paul von Hindenburg, he struggled with the colossal task of leading Russia's war effort against Germany, including strategy, tactics, logistics and coordination with the government. After the Gorlice–Tarnów offensive in 1915, Tsar Nicholas replaced the Grand Duke as commander-in-chief of the army. He later was a successful commander-in-chief in the Caucasus region. He was briefly recognized as the Emperor in 1922 in areas controlled by the White Armies movement in the Russian Far East.
Title: Grand Duke Sergei Mikhailovich of Russia
Content:  Grand Duke Sergei Mikhailovich of Russia (Серге́й Миха́йлович; 7 October 1869 &ndash; 18 July 1918) was the fifth son and sixth child of Grand Duke Michael Nikolaievich of Russia and a first cousin of Alexander III of Russia. He was born and raised in the Caucasus, where his father was viceroy. In 1881 the family moved to St Petersburg. He became a close friend of the then Tsarevich Nicholas. They grew apart upon Nicholas II's marriage and accession to the throne. Grand Duke Sergei remained a bachelor living at his father's palace in the imperial capital. He had a long affair with the famous ballerina Mathilde Kschessinska, who had previously been the mistress of Nicholas II. She was also later involved with Grand Duke Andrei Vladimorovich. Sergei recognized Mathilde's son as his 

Question: Who is the father of Grand Duke Nicholas Mikhailovich of Russia?
Answer: Grand Duke Michael Nikolaevich of Russia.
Grand Duke Mikhail Nikolaevich of Russia.
Michael Nikolaevich of Russia.
Mikhail Nikolaevich of Russia.