Prince (William Alexander Frederick) Ernest Casimir of the Netherlands, Prince of Orange-Nassau (Dutch: "Willem Alexander Frederik Ernst Casimir, Prins der Nederlanden, Prins van Oranje-Nassau"; Soestdijk Palace, 21 May 1822 – Brussels, 22 October 1822) was the fourth son of the Prince of Orange, later King William II of the Netherlands and his wife Grand Duchess Anna Pavlovna of Russia.
Anna Pavlovna of Russia (Russian: Анна Павловна ; Dutch: "Anna Paulowna"; 18 January 1795 — 1 March 1865) was a queen consort of the Netherlands.
Elizabeth of Bosnia (  1339  – January 1387) was queen consort and later regent of Hungary and Croatia, as well as queen consort of Poland.
 Daughter of Ban Stephen II of Bosnia, Elizabeth married King Louis I of Hungary in 1353.
 In 1370, she gave birth to a long-anticipated heir, Catherine, and became Queen of Poland when Louis succeeded his uncle, Casimir III.
 The royal couple had two more daughters, Mary and Hedwig, but Catherine died in 1378.
 Initially a powerless consort with no substantial influence, Elizabeth then started surrounding herself with noblemen loyal to her, led by her favourite, Nicholas I Garai.
 When Louis died in 1382, Mary ascended to the throne of Hungary with Elizabeth as regent.
 Unable to preserve the personal union of Hungary and Poland, the queen dowager secured the Polish throne for her youngest daughter, Hedwig.
Shin Saw Gyi (Burmese: ရှင်စောကြီး , ] ) was a chief queen consort of King Swa Saw Ke of Ava.
 She was also a principal queen of kings Kyawswa II of Pinya and Narathu of Pinya.
 She was a granddaughter of King Saw Yun, the founder of Sagaing Kingdom, and a sister of King Thado Minbya, the founder of Ava Kingdom.
 She was originally a queen consort of Swa, and was given the title of Queen of the Northern Palace and Pinya in fief.
 She became the chief queen after Queen Khame Mi died, and became the Queen of the Southern Palace.
Pauline Elisabeth Ottilie Luise zu Wied (29 December 1843 – 2 March 1916) was the Queen consort of Romania as the wife of King Carol I of Romania, widely known by her literary name of Carmen Sylva.
 Her brother William, 5th Prince of Wied married on 18 July 1871 in Wassenaar, Princess Marie of the Netherlands (1841–1910), younger daughter of Prince Frederick of the Netherlands (1792–1839), second son of William I of the Netherlands and his wife, Princess Louise of Prussia (1808–1870), daughter of Frederick William III of Prussia.
 Elisabeth was therefore the aunt of William of Albania.
This is a list of Swedish queens consort and spouses of Swedish monarchs and regents.
 The list covers a large time span and the role of a consort has changed much over the centuries.
 The first Swedish consorts are spoken of in legends.
 The consorts until c. 1000 are often semi-legendary, as are the monarchs.
 Between the 14th and 16th century, during periods of de facto Swedish independence from the formal union with Denmark, the Swedish regents did not have the title of king or queen, nor did the spouses of kings have the title of queen consort, although they had the equivalent position.
 Due to unions with Finland, Denmark and Norway, many of the Swedish consorts were also consorts of monarchs of these countries.
 Consorts listed during the period of 1380–1520 were in fact also consorts to monarchs of Denmark.
 The consorts listed during the period of 1814-1905 were also consorts to monarchs of Norway.
 Finland was from the Middle Ages a part of Sweden, and although there was no official title, such as "Queen Consort of Finland", from the 16th century until the year of 1809, the queen consort of Sweden also held the title "Grand Princess of Finland."
Anne of Brittany (French: "Anne de Bretagne" ; Breton: "Anna Breizh" ) (25/26 January 1477 – 9 January 1514 ) was Duchess of Brittany from 1488 until her death, and queen consort of France from 1491 to 1498 and from 1499 to her death.
 She is the only woman to have been queen consort of France twice.
 During the Italian Wars, Anne also became queen consort of Naples, from 1501 to 1504, and duchess consort of Milan, in 1499–1500 and from 1500 to 1512.
A queen consort is the wife of a reigning king (or an empress consort in the case of an emperor).
 In Brunei, the wife of the Sultan is known as a "Raja Isteri" with prefix "Pengiran Anak", equivalent with queen consort in English, as were the consorts of tsars when Bulgaria was still a monarchy.
 A queen consort usually shares her husband's social rank and status.
 She holds the feminine equivalent of the king's monarchical titles, but historically, she does not share the king's political and military powers.
 A queen regnant is a queen in her own right with all the powers of a monarch, who (usually) has become queen by inheriting the throne upon the death of the previous monarch.
Helvis of Brunswick-Grubenhagen (1353 – 15 January 1421), was the Queen consort of Cyprus and Queen consort of Armenia as the wife of King James I of Cyprus.
 He was also titular King of Jersusalem.
 She was styled Queen of Cyprus from 1382 to 1398; although at the time of his ascension to the Cypriot throne, he and Helvis were imprisoned in Genoa after they had been captured by the Genoese on the island of Rhodes.
 Almost all of Helvis' 12 children were born to her while she was held prisoner.
 In 1385, after negotiations and many ruinous concessions to the Genoese, they were released and James was crowned king.
 In 1393, she became Queen of Armenia.
Isabella of Balzo (24 June 1465 - 1533) was a Queen consort of Naples.
 She was the second consort and only Queen consort of Frederick IV of Naples.
 Isabella was also suo jure Duchess of Andria and Venosa and Princess of Altamura.

Question: What queen consort was the wife of William Alexander Frederick?
Answer: Anna Pavlovna of Russia