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.
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.
Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin
Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin (10 August 1869 – 3 September 1955) was a daughter of Frederick Francis II, Grand Duke of Mecklenburg by his third wife Princess Marie of Schwarzburg-Rudolstadt.
By her marriage to Frederick Augustus II, she became the consort of the last reigning Grand Duke of Oldenburg.
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
Princess Marie of Schwarzburg-Rudolstadt
Princess Marie of Schwarzburg-Rudolstadt (29 January 1850 – 22 April 1922) was the consort and third wife of Frederick Francis II, Grand Duke of Mecklenburg-Schwerin.
She was mother of Prince Hendrik, consort of Queen Wilhelmina of the Netherlands and father of Queen Juliana.
Princess Alexandrine of Prussia (1803–1892)
Princess Alexandrine of Prussia( 23 February 1803 – 21 April 1892) was Grand Duchess of Mecklenburg- Schwerin by marriage to Paul Frederick, Grand Duke of Mecklenburg- Schwerin.
She was the daughter of Frederick William III of Prussia and Louise of Mecklenburg- Strelitz.
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 Altburg of Oldenburg
Duchess Altburg Marie Matilda Olga of Oldenburg (19 May 1903 – 16 June 2001) was a daughter of Frederick Augustus II, Grand Duke of Oldenburg by his second wife Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin
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.

Question: Who is Duchess Elisabeth Alexandrine Of Mecklenburg-Schwerin's father?