Title: Christian IV of Denmark
Content:   Christian was born at Frederiksborg Castle in Denmark on 12 April 1577 as the third child and eldest son of King Frederick II of Denmark–Norway and Sofie of Mecklenburg-Schwerin. He was descended, through his mother's side, from king John of Denmark, and was thus the first descendant of King John to assume the crown since the deposition of King Christian II. At the time, Denmark was still an elective monarchy, so in spite of being the eldest son Christian was not automatically heir to the throne. However, in 1580, at the age of 3, his father had him elected Prince-Elect and successor to the throne.
Title: Christian VIII of Denmark
Content:  Christian was born at Christiansborg Palace in Copenhagen. He was the eldest son of Hereditary Prince Frederick of Denmark and Norway and Duchess Sophia Frederica of Mecklenburg-Schwerin. His paternal grandparents were King Frederick V of Denmark-Norway and his second wife, Duchess Juliana Maria of Brunswick-Wolfenbüttel. Christian's mother died in 1794 when he was eight years old, and his father died in 1805 when Christian was nineteen. His upbringing was marked by a thorough and broad-spectrum education with exposure to artists and scientists who were linked to his father's court. Christian inherited the talents of his highly gifted mother, and his amiability and handsome features are said to have made him very popular in Copenhagen.
Title: Christian I of Denmark
Content:  mother, Christian was also a cognatic descendant of King Eric V of Denmark through his second daughter Richeza (died 1308) and also a cognatic descendant of King Abel of Denmark through his daughter Sophie. Through his father, Christian was a cognatic descendant of King Eric IV of Denmark through his daughter Sophia. Christian thus descended from the three surviving sons of Valdemar II and his second wife Berengaria of Portugal. At the death of their father in 1440, Christian and his brothers jointly succeeded Dietrich as Count of Oldenburg and Delmenhorst. Christian was raised by his uncle, Duke Adolphus of Schleswig, Count of Holstein (1401–1459) as the childless duke wished for his young nephew to become his heir, and also succeeded in having Christian elected as his successor in the Duchy of Schleswig.
Title: Christian IV of Denmark
Content:  On 30 November 1597, he married Anne Catherine of Brandenburg, a daughter of Joachim Friedrich, Margrave of Brandenburg and Duke of Prussia.
Title: Christian IV of Denmark
Content:  officers. Christian had Munk placed under house arrest. She endeavoured to cover up her own disgrace by conniving at an intrigue between Vibeke Kruse, one of her discharged maids, and the king. In January 1630 the rupture became final, and Kirsten retired to her estates in Jutland. Meanwhile, Christian openly acknowledged Vibeke as his mistress, and she bore him several more children. With his first wife, Anne Catherine of Brandenburg he fathered the following children:  With his second wife, Kirsten Munk, he had 12 children, though the youngest, Dorothea Elisabeth, was rumoured to be the daughter of Kirsten's lover, Otto Ludwig: With Kirsten Madsdatter: With Karen Andersdatter: With Vibeke Kruse:
Title: Christian IX of Denmark
Content:  descendant of Helvig of Schauenburg (countess of Oldenburg), mother of King Christian I of Denmark, who was the "Semi-Salic" heiress of her brother Adolf of Schauenburg, last Schauenburg duke of Schleswig and count of Holstein. As such, Christian was eligible to succeed in the twin duchies of Schleswig-Holstein, but not first in line. Christian's mother was a daughter of Landgrave Charles of Hesse, an originally German prince, who, however, had grown up at the Danish court and had married King Frederick V of Denmark's youngest daughter, Princess Louise of Denmark. He had made a career in Denmark, where he was a Danish Field Marshal and Royal Governor of the duchies of Schleswig and Holstein. Through his mother, Christian was thus a great-grandson of Frederick V, great-great-grandson of George II of Great Britain and a descendant of several other monarchs, but had no direct claim to any European throne.
Title: Karen Andersdatter
Content:  Karen Andersdatter (died 1673 in Copenhagen, Denmark) was the Danish mistress of King Christian IV of Denmark-Norway and the mother of one of his three illegitimate but acknowledged children, Hans Ulrik Gyldenløve.
Title: Christian IV of Denmark
Content:  Christian IV (12 April 1577 – 28 February 1648) was King of Denmark and Norway and Duke of Holstein and Schleswig from 1588 to 1648. His reign of 59 years, 330 days is the longest of Danish monarchs, and of all Scandinavian monarchies. A member of the House of Oldenburg, Christian began his personal rule of Denmark in 1596 at the age of 19. He is remembered as one of the most popular, ambitious, and proactive Danish kings, having initiated many reforms and projects. Christian IV obtained for his kingdom a level of stability and wealth that was virtually unmatched elsewhere in Europe. He engaged Denmark in numerous wars, most notably the Thirty Years' War (1618–1648), which devastated much of Germany, undermined the Danish economy, and cost Denmark some of its conquered territories. He rebuilt and renamed the Norwegian capital Oslo as Christiania after himself, a name used until 1925.
Title: Kirsten Madsdatter
Content:  Kirsten Madsdatter (died 1629 ) was King Christian IV of Denmark's lover, and the mother of one of his three acknowledged, illegitimate sons, Christian Ulrik Gyldenløve. Kirsten Madsdatter was likely the daughter of Copenhagen's mayor Matthias Hansen, though this is unconfirmed. She was originally a chambermaid to Queen Anna Catherine. The relationship started before the death of the queen; their son was born in 1611. In 1612, the queen died. In 1612, Kirsten was married to Reinholt Hansen , who eventually took over as Mayor of Copenhagen after the death of Matthias Hansen. Meanwhile the king found Karen Andersdatter who became his new mistress in 1613. Kirsten died in 1629.
Title: Christian IV of Denmark
Content:  of Schleswig-Holstein (8 July 1621 – 16 March 1698); married Corfitz Ulfeldt. ; Count Valdemar Christian of Schleswig-Holstein (26 June 1622 – 26 February 1656). ; Countess Elisabeth Auguste of Schleswig-Holstein (28 December 1623 – 9 August 1677). ; Count Friedrich Christian of Schleswig-Holstein (26 April 1625 – 17 July 1627). ; Countess Christiane of Schleswig-Holstein (15 July 1626 – 6 May 1670); married Hannibal Sehested ; Countess Hedwig of Schleswig-Holstein (15 July 1626 – 5 October 1678). ; Countess Maria Katharina of Schleswig-Holstein (29 May 1628 – 1 September 1628). ; Countess Dorothea Elisabeth of Schleswig-Holstein (1 September 1629 – 18 March 1687). Christian Ulrik Gyldenløve (1611–1640). Dorothea Elisabeth 

Question: Who is the mother of Christian IV of Denmark?
Answer: Sophie of Mecklenburg-Güstrow.
Queen Sophie.