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.

First marriage
On 12 October 1799, he married Grand Duchess Elena Pavlovna of Russia, daughter of Tsar Paul I of Russia.

Issue

 * 1) Paul Frederick of Mecklenburg-Schwerin (1800-1842) Grand Duke of Mecklenburg-Schwerin, who in 1822 married Princess Alexandrine of Prussia (1803-1892)
 * 2) Marie of Mecklenburg-Schwerin (1803-1862), who in 1825 married Georg, Duke of Saxe-Altenburg.

Second marriage
On July 1, 1810, he married Princess Caroline Louise of Saxe-Weimar-Eisenach, daughter of Charles Augustus, Grand Duke of Saxe-Weimar-Eisenach.

Issue

 * 1) Prince Albert of Mecklenburg-Schwerin (1812-1834)
 * 2) Princess Hélène of Mecklenburg-Schwerin (1814-1858), who in 1837 married Prince Ferdinand Philippe, Duke of Orléans, son of King Louis Philippe I of the French
 * 3) Prince Magnus of Mecklenburg-Schwerin (1815-1816)

Third marriage
On April 3, 1818, he married Landgravine Auguste of Hesse-Homburg. They had no issue.