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Gustav Adolph, Duke of Mecklenburg
Born	(1633-02-26)26 February 1633 Güstrow
Died	6 October 1695(1695-10-06) (aged 62) Güstrow
Spouse	Magdalene Sibylle of Holstein-Gottorp ​ ​ (m. 1654)​
Issue Detail	John, Hereditary Prince of Mecklenburg-Güstrow Princess Eleonore Marie, Duchess of Mecklenburg-Strelitz Princess Magdalene Sophie, Duchess of Württemberg-Oels Christine, Countess of Stolberg-Gedern Charles, Hereditary Prince of Mecklenburg-Güstrow Hedwig, Duchess of Saxe-Merseburg-Zörbig Louise, Queen of Denmark Elisabeth, Duchess of Saxe-Merseburg Princess Augusta
House	Mecklenburg
Father	John Albert II, Duke of Mecklenburg
Mother	Eleonore Marie of Anhalt-Bernburg

Gustav Adolph, Duke of Mecklenburg [-Güstrow] (26 February 1633 – 6 October 1695) was the last ruler ofMecklenburg-Güstrow from 1636 until his death and lastLutheran Administrator of thePrince-Bishopric of Ratzeburg from 1636 to 1648.^[1]

Gustav Adolph was born at the ducal residence inGüstrow, the son of DukeJohn Albert II and his third wifeEleonore Marie (1600–1657), daughter of PrinceChristian I of Anhalt-Bernburg.

As Gustav Adolph was a minor when his father died in 1636, his uncle DukeAdolph Frederick I of Mecklenburg-Schwerin at first became regent at Güstrow. This was fiercely opposed by Gustav Adolph's mother. In 1654 he came of age and marriedMagdalene Sibylle, a daughter of DukeFrederick III of Holstein-Gottorp. Their marriage produced eleven children:

• Johann, Hereditary Prince of Mecklenburg-Güstrow (2 December 1655 – 6 February 1660).
• Eleonore (1 June 1657 – 24 February 1672).
• Marie (June 19, 1659 – 6 January 1701), married on 23 September 1684 to DukeAdolph Frederick II of Mecklenburg-Strelitz.
• Magdalene (5 July 1660 – 19 February 1702).
• Sophie (21 June 1662 – 1 June 1738), married on 6 December 1700 to DukeChristian Ulrich I of Württemberg-Oels.
• Christine (14 August 1663 – 3 August 1749), married on 4 May 1683 toLouis Christian, Count of Stolberg-Gedern.
• Charles, Hereditary Prince of Mecklenburg-Güstrow (18 November 1664 – 15 March 1688), married on 10 August 1687 toMarie Amalie of Brandenburg, a daughter of ElectorFrederick William.
• Hedwig (12 January 1666 – 9 August 1735), married on 1 December 1686 to DukeAugust of Saxe-Merseburg-Zörbig.
• Louise (28 August 1667 – 15 March 1721), married on 5 December 1696 to KingFrederick IV of Denmark.
• Elisabeth (3 September 1668 – 25 August 1738), married on 29 March 1692 to DukeHenry of Saxe-Merseburg-Spremberg.
• Augusta (27 December 1674 – 19 May 1756).

The death of the only surviving son, the Hereditary PrinceCharles, in 1688 at the age of 23, caused a succession crisis in Mecklenburg-Güstrow. Gustav Adolph's daughter Marie married her cousinAdolphus Frederick II of Mecklenburg, who after the death of his father-in-law claimed the Güstrow heritage, but could not prevail against the ruling duke ofMecklenburg-Schwerin. A younger daughter,Louise in 1695 married the Danish crown princeFrederick IV and in 1699 becamequeen consort ofDenmark.

Gustav Adolph died in Güstrow at the age of 62. The subsequent inheritance conflict within theHouse of Mecklenburg was settled by the establishment of theDuchy of Mecklenburg-Strelitz in 1701.

• 1633 births
• 1695 deaths
• House of Mecklenburg
• Dukes of Mecklenburg-Güstrow
• Lutheran Prince-Bishops of Ratzeburg

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