CS1 Danish-language sources (da)

Wilhelm, German Crown Prince, Crown Prince of Prussia (Friedrich Wilhelm Victor August Ernst; 6 May 1882 – 20 July 1951) was the eldest child of the last Kaiser, Wilhelm II, German Emperor, and his consort Augusta Victoria of Schleswig-Holstein, and thus a great-grandson of Queen Victoria, and distant cousin to many British Royals, such as Queen Elizabeth II. As Emperor Wilhelm's heir, he was the last Crown Prince of the German Empire and the Kingdom of Prussia, until the abolition of the monarchy.
Wilhelm became crown prince at the age of six in 1888, when his grandfather Frederick III died and his father became emperor. He was crown prince for 30 years until the fall of the empire on 9 November 1918. During World War I, he commanded the 5th Army from 1914 to 1916 and was commander of the Army Group German Crown Prince for the remainder of the war. After his return to Germany in 1923, he fought the Weimar Republic and campaigned for the reintroduction of the monarchy in Germany. After his plans to become president had been blocked by his father, Wilhelm supported Adolf Hitler's rise to power, but when Wilhelm realised that Hitler had no intention of restoring the monarchy, their relationship cooled. Wilhelm became head of the House of Hohenzollern on 4 June 1941 following the death of his father and held the position until his own death on 20 July 1951.

Philippe (born 15 April 1960) is King of the Belgians. He is the eldest child of King Albert II and Queen Paola. He succeeded his father upon the latter's abdication for health reasons on 21 July 2013. He married Mathilde d'Udekem d'Acoz in 1999, with whom he has four children. Their eldest child, Princess Elisabeth, is first in the line of succession.

Yoshihito (Japanese: 嘉仁, 31 August 1879 – 25 December 1926), posthumously honored as Emperor Taishō (大正天皇, Taishō-tennō), was the 123rd emperor of Japan, according to the traditional order of succession, reigning from 1912 until his death in 1926. The era he presided over is known as the Taishō era.
Born to Emperor Meiji and his concubine Yanagiwara Naruko, Yoshihito was proclaimed crown prince in 1888, his two older siblings having died in infancy. In 1900, he married Kujō Sadako, a member of the Kujō family of the Fujiwara clan. The couple had four children: Hirohito, Yasuhito, Nobuhito and Takahito. Upon the death of his father in 1912, Yoshihito ascended the Chrysanthemum Throne. Suffering from neurological issues for the better part of his life, he played only a limited role in politics and from 1919 on undertook no official duties. His reign was characterized by a liberal and democratic shift in political power known as Taishō Democracy. It also saw Japan's entrance in the First World War and the Great Kantō earthquake of 1923.
Yoshihito's declining health led to the appointment of Crown Prince Hirohito as prince regent in 1921. He spent the rest of his life as a recluse. In 1926, Yoshihito died of a heart attack at the age of 47 following a bout of pneumonia. He was succeeded by his eldest son, Hirohito, as Emperor of Japan.

Oscar II (Oscar Fredrik; 21 January 1829 – 8 December 1907) was King of Sweden from 1872 until his death in 1907 and King of Norway from 1872 to 1905.
Oscar was the son of King Oscar I and Queen Josephine. He inherited the Swedish and Norwegian thrones when his brother died in 1872. Oscar II ruled during a time when both countries were undergoing a period of industrialization and rapid technological progress. His reign also saw the gradual decline of the Union of Sweden and Norway, which culminated in its dissolution in 1905. In 1905, the throne of Norway was transferred to his grandnephew Prince Carl of Denmark under the regnal name Haakon VII. When Oscar died in 1907, he was succeeded in Sweden by his eldest son, Gustaf V.
Oscar II is the paternal great-great-grandfather of King Carl XVI Gustaf of Sweden. King Frederik X of Denmark is Oscar II's descendant through his son Gustaf V. King Harald V of Norway; King Philippe of the Belgians; and Henri, Grand Duke of Luxembourg are also descendants of Oscar II, all through his third son Prince Carl, Duke of Västergötland.

Willem-Alexander (Dutch: [ˈʋɪləm aːlɛkˈsɑndər]; Willem-Alexander Claus George Ferdinand; born 27 April 1967) is King of the Netherlands.
Willem-Alexander was born in Utrecht during the reign of his maternal grandmother, Queen Juliana, as the eldest child of Princess Beatrix and Prince Claus. He became Prince of Orange as heir apparent upon his mother's accession on 30 April 1980. He went to public primary and secondary schools in the Netherlands, an international sixth-form college in Wales, served in the Royal Netherlands Navy, and studied history at Leiden University. He married Máxima Zorreguieta Cerruti in 2002, and they have three daughters: Catharina-Amalia, Alexia, and Ariane. Willem-Alexander succeeded his mother as monarch upon her abdication in 2013.
Willem-Alexander is interested in sports and international water management issues. Until his accession to the throne, he was a member of the International Olympic Committee (1998–2013), chairman of the Advisory Committee on Water to the Dutch Minister of Infrastructure and the Environment (2004–2013), and chairman of the Secretary-General of the United Nations' Advisory Board on Water and Sanitation (2006–2013).

Carl XVI Gustaf (Carl Gustaf Folke Hubertus; born 30 April 1946) is King of Sweden.
Carl Gustaf was born during the reign of his great-grandfather, King Gustaf V. He is the youngest child and only son of Prince Gustaf Adolf, Duke of Västerbotten, and Princess Sibylla of Saxe-Coburg and Gotha. His father died in January 1947 in an airplane crash in Denmark when Carl Gustaf was nine months old. Carl Gustaf became crown prince and heir apparent to the Swedish throne at the age of four when his grandfather, King Gustaf VI Adolf, ascended the throne in 1950.
Carl Gustaf ascended the throne upon his grandfather's death on 15 September 1973. Shortly after he became king, the new 1974 Instrument of Government took effect, formally stripping Carl Gustaf of his remaining executive power. As a result, he no longer performs many of the duties normally accorded to a head of state, such as the formal appointment of the prime minister, signing off on legislation, and being commander-in-chief of the nation's military. The new instrument explicitly limited the king to ceremonial functions and, among other things, to be regularly informed of affairs of state. As head of the House of Bernadotte, Carl Gustaf has also been able to make a number of decisions about the titles and positions of its members.
In June 1976, Carl Gustaf married Silvia Sommerlath. They have three children: Victoria, Carl Philip, and Madeleine. The King's heir apparent, after passage on 1 January 1980 of a new law establishing absolute primogeniture, is his eldest child, Crown Princess Victoria. Before the passage of that law, Victoria's younger brother, Carl Philip, was briefly the heir apparent, as of his birth in May 1979. Carl XVI Gustaf is the longest-reigning monarch in Swedish history, having surpassed King Magnus IV's reign of 44 years and 222 days on 26 April 2018.

Prince Joachim of Denmark, Count of Monpezat, (Danish pronunciation: [ˈjoːæˌkʰim]; Joachim Holger Waldemar Christian; born 7 June 1969) is a member of the Danish royal family. The younger son of Queen Margrethe II, he is fifth in the line of succession to the Danish throne, following the four children of his elder brother King Frederik X.

Knud Grabow Christensen (born 19 December 1949), better known by his stage name Sebastian, is a Danish singer, guitarist and songwriter.Sebastian started playing guitar in 1966, and started writing songs in 1967. Since having worked in the folk rock genre in the 1970s, he became one of the most prominent pop rock musicians in Denmark and has scored numerous films and plays. His releases have reached combined sales of over 2.5 million copies since 1971. His singing voice began weakening in the end of the 1980s, because of bad health. He is still active, and has made several popular albums. So far, his career has spanned more than five decades.

Vibeke Vasbo (born 1944) is a Danish writer and women's rights and LGBT rights activist. In the early 1970s, she participated in the Redstocking movement and in the Danish Lesbian Movement. She embarked on a literary career in 1976 with Al den løgn om kvinders svaghed (All those Lies about Women's Weakness) expanding on the work of a woman crane driver, based on her experiences in Oslo in 1974-75.

Else Roesdahl (born 26 February 1942) is a Danish archaeologist, historian and educator. She has mediated the history of the Vikings for most of her life, including coordination of notable exhibitions on the Viking Age and authoring several books on the subject. Roesdahl's books have been translated into several languages.Her popular book The Vikings was first published in English in 1991.