Heirs apparent who never acceded

British Romantic poet (1792–1822)

Head of the House of Habsburg and German politician

Reza Pahlavi is an Iranian political activist and the former Crown Prince of the Pahlavi dynasty of Iran. He is the eldest son of Mohammad Reza Pahlavi, the last Shah of Iran, and his wife, Empress Farah. He lives in the United States as a dissident in exile.

last caliph of the Ottoman Dynasty (1868–1944)

King of Castile (1506), Ruler of Habsburg Netherlands (1482-1506)

Absalom (), according to the Hebrew Bible, was an Israelite prince. Born to David and Maacah, who was from Geshur, he was the only full sibling of Tamar. He is described in the Hebrew Bible as being exceptionally beautiful, as is his sister. In the narrative of 2 Samuel 13, his sister Tamar takes refuge at his house after she is raped by their paternal half-brother Amnon (born to David and Ahinoam, who was from Jezreel); David is angered by the incident, but does nothing, as Amnon is his heir apparent. Infuriated by the rape and David's inaction, Absalom assassinates Amnon and subsequently fle

Austrian archduke (1858-1889)

King of Bohemia, Hungary, Croatia, and the Romans (1633-1654)

Duke of Albany and King consort of Scotland (1545-1567)

Prussian Crown Prince (1882-1951)

heir apparent to the British throne from 1727 until his death

Ottoman prince; son of Suleiman the Magnificent (1515-1553)

Polish and Lithuanian prince (1458–1484)

Qajar crown prince

disputed Head of the House of Savoy from 1983 to 2024

Head of the House of Karađorđević

former Crown Prince of Greece

German king (1220-1235)

Italian general (1869–1931)

Indian prince

According to 2 Samuel, Adonijah (, ’Ǎḏōnīyyā; "my lord is Yah") was the fourth son of King David. His mother was Haggith as recorded in the book of . Adonijah was born at Hebron during the long conflict between David and the House of Saul. In 1 Kings, he briefly proclaimed himself king of Israel during the terminal illness of his father David, before peacefully ceding the throne to his brother Solomon.

German general (1869–1955)

Amnon (, "faithful") was, in the Hebrew Bible, the oldest son of King David and his second wife, Ahinoam of Jezreel. He was born in Hebron during his father's reign in Judah. He was the heir apparent to the throne of Israel until he was assassinated by his paternal half-brother Absalom to avenge the rape of Absalom's sister Tamar.

heroic figure in 1 Samuel

claimant to the headship of the Italian House of Savoy

Hanoverian Royal (1887-1953)

former King of Hungary (1290–1295)

Rhadamistus (died 58) was a royal prince of the Pharnavazid dynasty of the Iberia who reigned over the Kingdom of Armenia from 51 to 53 and 54 to 55. He was considered a usurper and tyrant, who was overthrown in a rebellion supported by the Parthian Empire.

Head of the House of Hanover (1845–1923)

King of Sicily and Infante and Crown prince of Aragon

Regent and Crown Prince of Iraq (1913–1958)

16th-century English nobleman; (1516-1547)

English courtier and nobleman (1504-1536); brother of Anne Boleyn

Head of the House of Zogu (1961-2011)

Heir apparent in the Margraviate of Baden (1755-1801)

German prince (1835-1905)

Belgian noble (1102–1128)

German king

son of Louis Henri, Prince of Condé (1772–1804)

Saint Hermenegild or Ermengild (died 13 April 585; ; , from Gothic 𐌹𐍂𐌼𐌿𐌽𐌰𐌲𐌹𐌻𐌳𐍃 *Airmana-gild, "immense tribute"), was the son of King Liuvigild of the Visigothic Kingdom in the Iberian Peninsula and southern France. He fell out with his father in 579, then revolted the following year. During his rebellion, he converted from Arianism to Catholicism. Hermenegild was defeated in 584 and exiled. His death was later celebrated as a martyrdom due to the influence of Pope Gregory I's Dialogues, in which he portrayed Hermenegild as a "Catholic martyr rebelling against the tyranny of an Aria

elder son of Prince Henry, Duke of Gloucester, and Princess Alice, Duchess of Gloucester (1941–1972)

son of King St. Stephen I of Hungary and Giselle of Bavaria.

Electoral Prince of Bavaria

British prince (1883-1938)

King of Navarre

King of Navarre

(1914–1987); head of the House of Hanover from 1953-1987

Tuscan prince (1663-1713)

Herodian prince of Judea

Byzantine junior emperor; (1106-1142)

son of Herod the Great of Judea and Mariamne II (c. 27 BC - 33/34 AD)

Duke of Lorraine and poet

Prince of Parma

Montenegrin prince (1871–1939)

son and heir of Robert I, Duke of Burgundy, but died during his father's lifetime

Japanese prince (1946-2012)

Co-king of Denmark (1209-1231)

British Royal Family member (1874–1899)

Dutch Royal Heir (1851-1884)

duke of Swabia