Duchess Marie Louise of Mecklenburg-Schwerin
Duchess Marie Louise of Mecklenburg- Schwerin( 31 March 180326 October 1862) was daughter of Frederick Louis, Hereditary Grand Duke of Mecklenburg- Schwerin and consort of Georg, Duke of Saxe- Altenburg.
Duchess Marie of Mecklenburg-Schwerin
Duchess Marie of Mecklenburg-Schwerin (later Grand Duchess Maria Pavlovna of Russia, known as "Miechen" or "Maria Pavlovna the Elder"; 14 May 1854 – 6 September 1920) was born Marie Alexandrine Elisabeth Eleonore of Mecklenburg-Schwerin, daughter of Grand Duke Frederick Francis II of Mecklenburg-Schwerin and Princess Augusta Reuss of Köstritz.
A prominent hostess in St Petersburg following her marriage to the Grand Duke Vladimir Alexandrovich of Russia
, she was known as the "grandest of the grand duchesses" and had an open rivalry with her sister-in-law the Empress Maria Feodorovna.
Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin
Frederick Louis of Mecklenburg- Schwerin( 13 June 1778 – 29 November 1819) was a hereditary prince of the Grand Duchy of Mecklenburg- Schwerin, one of the constituent states of the German Confederation.
He was the son of Frederick Francis I, Grand Duke of Mecklenburg- Schwerin, and of Princess Louise of Saxe- Gotha- Altenburg.
Duchess Louise Charlotte of Mecklenburg-Schwerin
Duchess Louise Charlotte of Mecklenburg- Schwerin( 19 November 1779 – 4 January 1801) was the maternal grandmother of Prince Albert, husband of Queen Victoria of the United Kingdom.
Louise Charlotte was born Duchess of Mecklenburg- Schwerin, her father being Friedrich Franz I, Grand Duke of Mecklenburg- Schwerin.
Her mother was Princess Louise of Saxe- Gotha- Altenburg; her sister Charlotte of Mecklenburg- Schwerin( 1784–1840) married King Christian VIII of Denmark.
Grand Duke Vladimir Alexandrovich of Russia
Grand Duke Vladimir Alexandrovich of Russia (22 April 1847 – 17 February 1909) was a son of Emperor Alexander II of Russia, a brother of Emperor Alexander III of Russia and the senior Grand Duke of the House of Romanov during the reign of his nephew, Emperor Nicholas II.
Grand Duke Vladimir followed a military career and occupied important military positions during the reigns of the last three Russian Emperors.
Interested in artistic and intellectual pursuits; he was appointed President of the Academy of Fine Arts.
He functioned as a patron of many artists and as a sponsor of the Imperial ballet.
During the reign of his father, Emperor Alexander II, he was made Adjutant-General, senator in 1868 and a member of the Council of State in 1872.
His brother, Alexander III, also promoted his career.
He became a member of the Council of Ministers, Commander of the Imperial Guards Corps and Military Governor of Saint Petersburg.
He tried to exert some influence over his nephew Tsar Nicholas II, but had to content himself with holding a rival court with his wife Grand Duchess Maria Pavlovna at his palace in Saint Petersburg.
The events of Bloody Sunday in 1905, while he was Military Governor of St Petersburg, tarnished his reputation.
During the last years of his life, the rift between his family and that of Nicholas II widened.
He died after a stroke in 1909.
Magnus II, Duke of Mecklenburg
Magnus II, Duke of Mecklenburg- Schwerin and Güstrow( 1441 – 20 November 1503) was duke of Mecklenburg- Schwerin from 1477 until his death.
Duke Louis of Mecklenburg-Schwerin
Duke Louis of Mecklenburg- Schwerin( 6 August 172512 September 1778) was heir to the Dukedom of Mecklenburg- Schwerin from 1756 to his death.
He was also the father of the first Grand Duke of Mecklenburg- Schwerin Frederick Francis I
Friedrich Franz, Hereditary Grand Duke of Mecklenburg-Schwerin
Friedrich Franz, Hereditary Grand Duke of Mecklenburg- Schwerin( 22 April 1910 – 31 July 2001) was the heir apparent to the throne of Mecklenburg- Schwerin and a member of the Waffen- SS.
Christian Louis I, Duke of Mecklenburg
Christian Louis I, Duke of Mecklenburg- Schwerin( 1 December 1623 in Schwerin – 21 June 1692 in The Hague) was a reigning Duke of Mecklenburg- Schwerin.
Duchess Marie Antoinette of Mecklenburg
Duchess Marie Antoinette of Mecklenburg-Schwerin, also "Manette" (Marie Antoinette Margarethe Mathilde; 28 May 1884 – 26 October 1944) was the second daughter of Duke Paul Frederick of Mecklenburg and the Austrian-born Princess Marie of Windisch-Graetz.

Question: Who is the father-in-law of Duchess Marie Of Mecklenburg-Schwerin?
Answer: Alexander II of Russia