List of Swedish monarchs
House of Palatinate-Zweibrücken, a branch of the House of Wittelsbach

Name
Portrait
Birth
Marriages
Death
Charles X Gustav (Karl X Gustav) 6 June 1654 – 13 February 1660
-
Nyköping Castle, 8 November 1622, son of John Casimir, Count Palatine of Zweibrücken-Kleeburg and Catharina of Sweden (daughter of Charles IX)
Hedwig Eleonora of Holstein-Gottorp
Gothenburg, 13 February 1660, aged 37, buried in Riddarholmen Church
Charles XI (Karl XI) 13 February 1660 – 5 April 1697
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Tre Kronor (castle), 24 November 1655 son of Charles X and Hedwig Eleonora of Holstein-Gottorp
Ulrika Eleonora of Denmark
Tre Kronor (castle), 5 April 1697, aged 41, buried in Riddarholmen Church
Charles XII (Karl XII) 5 April 1697 – 30 November 1718
-
Tre Kronor (castle), 17 June 1682 son of Charles XI and Ulrika Eleonora of Denmark
None
Fredrikshald, Norway, 30 November 1718, aged 36, buried in Riddarholmen Church
Ulrica Eleanor (Ulrika Eleonora) 5 December 1718 – 29 February 1720
-
Tre Kronor (castle), 23 January 1688 daughter of Charles XI and Ulrika Eleonora of Denmark
Landgrave Frederick V House of Hesse (see below)
Stockholm, 24 November 1741, aged 53, buried in Riddarholmen Church

Question: Who is Hedwig Eleonora of Holstein-Gottorp?
Answer: Hedwig Eleonora of Holstein-Gottorp was the Queen of Sweden from 1654 until 1660 by marriage to Charles X Gustav of Sweden and the mother of Charles XI.