Question: Which King of Sweden and Norway had a mistress named Jacquette Löwenhielm?

Context paragraphs:
Kingdom of Norway (1814): 1814 was a pivotal year in the history of the Kingdom of Norway.  It started with Norway in a union with Denmark, subject to a naval blockade by The British Empire, being ceded to the King of Sweden.  In May a constitutional convention declared Norway independent.  By the end of the year the Norwegian parliament had agreed to join with Sweden in a personal union under the monarch of Sweden.  Although nationalist aspirations were not to be fully realized until the events of 1905, 1814 was the crisis and turning point in events that would lead to a fully independent Norway.

Esto huele mal: Ricardo Caicedo is a well-to-do businessman in Bogotá, who in all appearances has a happy family life.  His wife, Elena is devoted to him and the couple have a young son.  However, Ricardo has been having an affair with a mistress named Manuela, which started a year ago.  One day, in order to be with his mistress, Ricardo pretends to have a business meeting with several Argentinian associates at the Nogal Club.  His lie is about to be uncovered when a terrorist placed a bomb at the club where Ricardo was supposed to be.  His wife is worried about his safety and calls him.  Ricardo is on the other side of town leaving Manuela’s house.  To avoid revealing his infidelity Ricardo is determined to prove that he was at the scene of the attack.  Aided by his friend Guzman, Ricardo invents an elaborate lie which portrays him as being one of the many victims of the terrorist attack.  He is mistaken to be the saviour of a little girl's life and he becomes a hero.

Oscar I of Sweden: Oscar I (born Joseph François Oscar Bernadotte; 4 July 1799 – 8 July 1859) was King of Sweden and Norway from 8 March 1844 until his death.  He was the second monarch of the House of Bernadotte.

Chief Court Mistress: Court Mistress (Danish: "hofmesterinde" ; Dutch: "hofmeesteres" ('Court mistress'); German: "Hofmeisterin"; Norwegian: "hoffmesterinne" ; Swedish: "hovmästarinna" ) or Chief Court Mistress (Danish: "Overhofmesterinde" ; Dutch: "Grootmeesteres" ('Grand Mistress') German: "Obersthofmeisterin"; Norwegian: "overhoffmesterinne" ; Swedish: "överhovmästarinna" ; Russia: "Ober-Hofmeisterin") is or was the title of the senior lady-in-waiting in the courts of Austria, Denmark, Norway, the Netherlands, Sweden, Imperial Russia, and the German princely and royal courts.

Carl Löwenhielm: Count Carl Löwenhielm (3 November 1772 – 9 June 1861) was a Swedish military officer, diplomat, and politician; he was a member of the Swedish cabinet between 1822–1839.  He was an illegitimate son of King Charles XIII of Sweden and Augusta von Fersen (married to the Chancellor of the Royal Court Fredrik Adolf Löwenhielm) and a half-brother of Gustaf Löwenhielm.

Ingeborg of Norway: Ingeborg of Norway (Old Norse "Ingibjörg Hákonardóttir", Swedish "Ingeborg Håkansdotter", Norwegian "Ingebjørg Håkonsdatter"; 1301 – 17 June 1361), was a Norwegian princess and by marriage a Swedish royal duchess with a position in the regency governments in Norway (1319–27) and Sweden (1319–26) during the minority of her son, King Magnus of Norway and Sweden.  In 1318-1319, she was Sweden's "de facto" ruler, and from 1319 until 1326, she was Sweden's first "de jure" female regent.

Charles Goodall (poet): Charles Goodall (1671—May 11, 1689) is a minor English poet.  A student of Eton College and then Merton College, Oxford, he wrote a number of romantic and erotic poems referring to male students at said colleges.  In 1689, the year of his death, he put together a collection entitled "Poems and Translations" which contains 33 poems with male-male subject matter, eleven regarding women, and 13 to a mistress named 'Idera' (considered probably imaginary).  A number of the homoerotic poems have been rewritten to remove the same-sex subject matter.

Olaf II of Denmark: Olaf II Haakonsson (1370 – 23 August 1387) was King of Denmark as Olaf II (1376–1387) and King of Norway as Olaf IV (1380–1387).  Olaf was son of King Haakon VI of Norway and the grandson of King Magnus IV of Sweden.  His mother was Queen Margaret I of Denmark which made him the grandson of King Valdemar IV of Denmark.  In addition to his claim on the thrones of Denmark and later Norway, he was in the direct succession line to the throne of Sweden (but for the interposition of Albert of Mecklenburg).

Jacquette Löwenhielm: Gustava Charlotta "Jacquette" Aurora Gyldenstolpe (4 July 1797 – 7 January 1839, Constantinople) was a Swedish noble and lady-in-waiting.  She is known as the mistress of Oscar I of Sweden in circa 1819-1827.

Robert de Lenoncourt (cardinal): Robert de Lenoncourt (1485? ; – 4 February, 1561) was a French bishop, Cardinal, and diplomat.  He was the son of Thierry de Lenoncourt, Seigneur de Vignory, Councillor and Chamberlain of the King, and Jeanne de Ville.  He had a brother, Henry, Sire de Lenoncourt and Baron of Vignory, a sister named Jacquette, who married Jean d'Aguerre, son of the Governor of Mouzon (January 1509), and a sister named Nicole, who married Érard du Châtelet.  Robert's paternal uncle, also called Robert de Lenoncourt, was Archbishop of Reims.

Supporting paragraphs: Jacquette Löwenhielm Oscar I of Sweden
Answer: Oscar I of Sweden