Grand Crosses of the Order of Aviz

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.

Alexander I (Russian: Александр I Павлович, romanized: Aleksandr I Pavlovich, IPA: [ɐlʲɪkˈsandr ˈpavləvʲɪtɕ]; 23 December [O.S. 12 December] 1777 – 1 December [O.S. 19 November] 1825), nicknamed "the Blessed", was Emperor of Russia from 1801, the first king of Congress Poland from 1815, and the grand duke of Finland from 1809 to his death in 1825. He was the eldest son of Emperor Paul I and Sophie Dorothea of Württemberg.
The son of Grand Duke Paul Petrovich, later Paul I, Alexander succeeded to the throne after his father was murdered. He ruled Russia during the chaotic period of the Napoleonic Wars. As prince and during the early years of his reign, Alexander often used liberal rhetoric, but continued Russia's absolutist policies in practice. In the first years of his reign, he initiated some minor social reforms and (in 1803–04) major liberal educational reforms, such as building more universities. Alexander appointed Mikhail Speransky, the son of a village priest, as one of his closest advisors. The Collegia were abolished and replaced by the State Council, which was created to improve legislation. Plans were also made to set up a parliament and sign a constitution. Alexander also was hostile towards European powers. Unlike his predecessors who tried to westernize Russia so it could compete with European nations, Alexander was a Russian nationalist and Slavophilist who wanted Russia to develop on the basis of Russian culture rather than European.
In foreign policy, he changed Russia's position towards France four times between 1804 and 1812 among neutrality, opposition, and alliance. In 1805 he joined Britain in the War of the Third Coalition against Napoleon, but after suffering massive defeats at the battles of Austerlitz and Friedland, he switched sides and formed an alliance with Napoleon by the Treaty of Tilsit (1807) and joined Napoleon's Continental System. He fought a small-scale naval war against Britain between 1807 and 1812 as well as a short war against Sweden (1808–09) after Sweden's refusal to join the Continental System. Alexander and Napoleon hardly agreed, especially regarding Poland, and the alliance collapsed by 1810. Alexander's greatest triumph came in 1812 when Napoleon's invasion of Russia proved to be a catastrophic disaster for the French. As part of the winning coalition against Napoleon, he gained territory in Finland and Poland. He formed the Holy Alliance to suppress revolutionary movements in Europe which he saw as immoral threats to legitimate Christian monarchs. He also helped Austria's Klemens von Metternich in suppressing all national and liberal movements.
During the second half of his reign, Alexander became increasingly arbitrary, reactionary, and fearful of plots against him; as a result he ended many of the reforms he made earlier. He purged schools of foreign teachers, as education became more religiously driven as well as politically conservative. Speransky was replaced as advisor with the strict artillery inspector Aleksey Arakcheyev, who oversaw the creation of military settlements. Alexander died of typhus in December 1825 while on a trip to southern Russia. He left no legitimate children, as his two daughters died in childhood. Neither of his brothers wanted to become emperor. After a period of great confusion (that presaged the failed Decembrist revolt of liberal army officers in the weeks after his death), he was succeeded by his younger brother, Nicholas I.

Charles Kenney Duncan (December 7, 1911 – June 27, 1994) was a United States Navy four star admiral who served as Supreme Allied Commander Atlantic/Commander in Chief, United States Atlantic Command/Commander in Chief, U.S. Atlantic Fleet (SACLANT/CINCLANT/CINCLANTFLT) from 1970 to 1972.