Christian August of Holstein-Gottorp-Eutin was a cadet of the reigning ducal House of Holstein-Gottorp who became prince of Eutin, prince-bishop of Lübeck and regent of the Duchy of Holstein-Gottorp. Wikipedia
Born: January 11, 1673
Died: April 24, 1726 (age 53 years), Schleswig-Holstein, Germany
Grandchildren: Catherine II of Russia, Charles XIII, Gustav III, and more
Siblings: Frederick IV, Duke of Holstein-Gottorp
Spouse: Princess Albertina Frederica of Baden-Durlach (m. 1704–1726)