Title: Prince Nikolai of Denmark
Content:  Prince Nikolai of Denmark, Count of Monpezat (Nikolai William Alexander Frederik; born 28 August 1999) is a member of the Danish royal family. He is the eldest son of Prince Joachim and his first wife, Alexandra, Countess of Frederiksborg. He is currently seventh in the line of succession to the Danish throne. At the time of his birth, he was third, after his uncle and father.
Title: Prince Nikolai of Denmark
Content:  Prince Nikolai was born at Rigshospitalet in Copenhagen on 28 August 1999. He is the oldest grandchild of Queen Margrethe II of Denmark and her husband, Prince Henrik. He was christened in the chapel of the Fredensborg Palace on 6 November 1999 by the Danish Chaplain-in-Ordinary, Christian Thodberg. At the christening, the musical work Lys på din vej, composed by Frederik Magle and dedicated to Prince Nikolai, was performed for the first time. His godparents are his paternal uncle, the Crown Prince of Denmark; his maternal aunt, Nicola Baird; the Earl of Wessex, Peter Steenstrup and Camilla Flint. After their divorce in 2005, Prince Joachim and Alexandra had joint custody of Prince Nikolai and his brother. Nikolai was confirmed on 18 May 2013 in Fredensborg Palace Church in the presence of his immediate family 
Title: Prince Nikolai of Denmark
Content:  Nikolai is styled as "His Highness Prince Nikolai of Denmark, Count of Monpezat". He has been Prince of Denmark since birth and Count of Monpezat since 29 April 2008, when Queen Margrethe granted the title to her male-line descendants.
Title: Prince Henrik of Denmark (born 2009)
Content:  Prince Henrik of Denmark (Henrik Carl Joachim Alain; born 4 May 2009) is a member of the Danish royal family. He is the third and youngest son of Prince Joachim and the only son of his second wife, Princess Marie. Prince Henrik is ninth in the line of succession to the Danish throne.
Title: Prince Nikolaos of Greece and Denmark
Content:  Prince Nikolaos of Greece and Denmark (Greek: Νικόλαος; born 1 October 1969) is the third child of Constantine II and Anne-Marie of Denmark, who were the last King and Queen of Greece, reigning from 1964 to 1973.
Title: Prince Nicholas of Greece and Denmark
Content:  Prince Nicholas of Greece and Denmark (Νικόλαος; 22 January 1872 – 8 February 1938), of the Glücksburg branch of the House of Oldenburg, was the fourth child and third son of George I of Greece, and of Queen Olga. He was known as "Greek Nicky" within the family to distinguish him from his cousin Emperor Nicholas II of Russia (first cousin on the paternal side and second cousin on the maternal side). Prince Nicholas was a talented painter, often signing his works as "Nicolas Leprince."
Title: Prince Felix of Denmark
Content:  Prince Felix of Denmark (Felix Henrik Valdemar Christian; born 22 July 2002) is a member of the Danish royal family. He is the younger son of Prince Joachim and his first wife, Alexandra, Countess of Frederiksborg. Prince Felix is currently eighth in the line of succession to the Danish throne.
Title: Prince Christian of Denmark
Content:  Prince Christian of Denmark, Count of Monpezat (Christian Valdemar Henri John; born 15 October 2005) is a member of the Danish royal family. He is the eldest child of Crown Prince Frederik and Crown Princess Mary. A grandson of Queen Margrethe II, he has been second in the line of succession to the Danish throne since birth.
Title: Prince Nikola of Yugoslavia
Content:  He was a paternal grandson of Arsen Karađorđević, Prince of Serbia and Princess Aurora Pavlovna Demidova di San Donato. He was a maternal grandson of Prince Nicholas of Greece and Denmark and Grand Duchess Elena Vladimirovna of Russia.
Title: Prince Vincent of Denmark
Content:  Prince Vincent of Denmark, Count of Monpezat (Vincent Frederik Minik Alexander; born 8 January 2011) is a member of the Danish royal family. He is the third child and younger son of Crown Prince Frederik and Crown Princess Mary, the sixth grandchild and youngest grandson of Queen Margrethe II and Prince Henrik, and the older twin brother of Princess Josephine. Vincent is fourth in line to the Danish throne, after his father, older brother Prince Christian and older sister, Princess Isabella.

Question: Who is the father of Prince Nikolai of Denmark?
Answer: Prince Joachim of Denmark.
Joachim Holger Waldemar Christian.
Joachim Holger Valdemar Christian, Prince of Denmark.
Prince Joachim of Denmark, Count of Monpezat.