Hasan Ali Shah was succeeded as Imam by his eldest son Aqa Ali Shah, who became Aga Khan II.

Alfonso was the eldest son of Prince Francisco de Asis de Borbón-Dos Sicilias and Queen Isabel II, whose reign was marked by a constant political crisis which had several causes.

Anne was in turn the eldest daughter of George II of Great Britain and Caroline of Ansbach.

Constans ’ brother, Constantine II, soon complained that he had not received the amount of territory that was his due, stemming from his position as the eldest of Constantine ’ s sons.

The eldest son of Constantine the Great and Fausta after the death of his half-brother Crispus, Constantine II was born in Arles in February, 316, and raised as a Christian.

He was the eldest son of Prince John, ( who succeeded his brother Frederick Augustus II on the Saxon throne as King John in 1854 ) by his wife Amalie Auguste of Bavaria.

Frederick I of Ansbach and Bayreuth ( also known as Frederick V ; or ; 8 May 1460 – 4 April 1536 ) was born at Ansbach as the eldest son of the Albert III, Margrave of Brandenburg by his second wife Anna, daughter of Frederick II, Elector of Saxony.

His eldest surviving son was Frederick II ( Fritz ), born in 1712.

He succeeded his elder brother William II as King of England in 1100 and defeated his eldest brother, Robert Curthose, to become Duke of Normandy in 1106.

He left one daughter and sole-heiress Grace de Tracy who married John de Sudeley, They had two children: Ralph de Sudeley ( d. 1192 ), the eldest, who became his father's heir, and Sir William II " de Tracy " ( d. post 1172 ), who inherited his mother's barony of Bradninch and assumed her family name in lieu of his patronymic.

He died in 1499 from pleural effusion at Arneburg Castle and was succeeded by his eldest son Joachim I. John was the first of the Hohenzollern electors to be buried in Brandenburg, first at Lehnin Abbey, later transferred to Berlin Cathedral by order of his grandson Joachim II.

Born in Bozdağan or Manisa, Murad III was the eldest son of sultan Selim II ( 1566 – 74 ), and succeeded his father in 1574.

She now turned her attention to her eldest son, the future Nicholas II, for it was on him that both her personal future and the future of the dynasty now depended.

Mary, born at St. James's Palace in London on 30 April 1662, was the eldest daughter of James, Duke of York ( the future James II & VII ), and his first wife, Lady Anne Hyde.

At first William was seen as a moderate ruler, whose friendship with liberal Britain was symbolised by the recent marriage of his son ( the future Frederick III ) to Queen Victoria's eldest daughter ; their son ( the future William II ) was born in 1859.

He was the eldest son and successor of Maximilian II, Holy Roman Emperor, King of Bohemia, and King of Hungary and Croatia ; his mother was Maria of Spain, a daughter of Charles V and Isabella of Portugal.

* Gruffydd ap Rhys II ( died 1201 ) was the eldest legitimate son and was nominated by Rhys as his successor.

* 1922 – King Constantine I of Greece abdicates his throne in favor of his eldest son, King George II.

When Louis the Pious died in 840, his eldest son, Lothair I, claimed overlordship over his brothers ' kingdoms and supported the claim of his nephew Pepin II as king of Aquitaine, a large province in western France.

Lothair's eldest son, Louis II inherited Italy and his father's claim to the Imperial title.

Count Herbert II of Maine died in 1062, and William, who had betrothed his eldest son Robert to the sister of Herbert, claimed the county through his son.

* Edward, the Black Prince ( 1330 – 1376 ) or Edward of Woodstock, Prince of Wales, KG, was the eldest son of King Edward III of England and Philippa of Hainault, and father to King Richard II of England.

* August 24 – Isabella, eldest daughter of Isabella I of Castile and Ferdinand II of Aragon ( b. 1470 )

* August 30 – Anne, eldest daughter of King George II of Great Britain, is given the title Princess Royal.

* John of Gaunt, the uncle of Richard II of England, makes peace with Castile and gives up his claim to the Castilian throne by allowing his daughter Katherine of Lancaster to marry Prince Henry, the eldest son of John I of Castile.

Raymond was the son of Raymond IV of Tripoli ( the eldest son of Bohemund III ) by his wife Alice of Armenia.

Artaxias II ( also called Artaxes or Artashes, Armenian: Արտաշես Երկրորդ ) ( reigned 34 BC – 20 BC ) was a king of Armenia, the eldest son of Artavasdes II.

with his war preparations, trusting especially in his existing alliance with Tigran of Armenia, although the more distant connection with Parthia was now without use because his ally Mithradates II had been slain by his rival Sanatruk attacking from the east in summer 91 BC, and a serious internal war persisted between Sanatruk and Mithradates ' eldest son and heir Gotarzes I.

* June 17, 809 (): In the 4th year of Emperor Heizei's reign, he fell ill and abdicated ; and the succession ( senso ) was received by Kammu's second son Saga, the eldest son having become a Buddhist priest.

His eldest son, Pedro I of Brazil, briefly became Pedro IV of Portugal, but neither the Portuguese nor the Brazilians wanted a unified monarchy ; consequently, Pedro abdicated the Portuguese crown in favor of his 7-year-old daughter, Maria da Glória, on the condition that when of age she would marry his brother, Miguel.

Philip abdicated in January 1724 in favor of Louis I, his eldest son with his first wife, but Louis died in August and Philip resumed the crown.

After George's death in 1936, her eldest son Edward became King-Emperor, but to her dismay he abdicated the same year in order to marry twice-divorced American socialite Wallis Simpson.

On 14 January 1724, Philip abdicated the throne to his eldest son, the seventeen-year old Louis, for reasons still subject to debate.

With his army shattered, Tsar Ferdinand abdicated to save the Bulgarian throne in favour of his eldest son who became Tsar Boris III on 3 October 1918.

On 30 April 1980, the day of her 71st birthday, Queen Juliana abdicated and her eldest daughter succeeded her as Queen Beatrix of the Netherlands.

He abdicated the throne for the second and last time in 1922, when Greece lost the Greco-Turkish War of 1919-1922, and was succeeded by his eldest son, George II.

Following an army revolt, Constantine abdicated the throne again on 27 September 1922 and was succeeded by his eldest son, George II.

Not willing to rule as a constitutional monarch, Ludwig abdicated on 20 March 1848 in favour of his eldest son, Maximilian.

On 6 October 1759, he abdicated in favour of his son Ferdinand ( Charles's eldest son Philip had learning difficulties and the second son, Charles, became the heir to the Spanish throne ).

* 1221 ( Jōkyū 3, 20th day of the 4th month ): In the 11th year of Juntoku-tennō's reign ( 順徳天皇11年 ), the emperor abdicated ; and the succession (‘‘ senso ’’) was received by eldest son who was only 4 years old.

* 1198 ( Kenkyū 9, 11th day of the 1st month ): In the 15th year of Go-Toba-tennō's reign ( 後鳥天皇15年 ), the emperor abdicated ; and the succession (‘‘ senso ’’) was received by his eldest son.

On November 18, 1348, he abdicated in favor of the eldest son of his older brother, the former claimant to the throne Emperor Kōgon, who became the Northern Pretender Emperor Sukō.

Aware that his brother's supporters were ready to bring Miguel back and put him in the throne, Peter decided for a more consensual option ; he abdicated the throne to his eldest daughter, Maria da Glória ( who was only seven years old ), and she should marry her uncle Miguel, who should accept the liberal constitution and act as a regent until his niece was an adult.

Despite his role in Brazilian independence, he became the king of Portugal in 1826 but immediately abdicated in favor of his eldest daughter.

Ludwig tried to institute a few minor reforms but they proved insufficient to quell the storm of protests and on March 16, 1848, Ludwig I abdicated in favor of his eldest son Maximilian II.

After he abdicated in 889, his eldest son and successor tried to restore the old pagan religion but was deposed by Boris I.

The eldest son Devapi suffered from leprosy and abdicated his inheritance to become a hermit.

He ruled Hejaz until 1924, when, defeated by Abdul Aziz al Saud, he abdicated the kingdom and other secular titles to his eldest son Ali.

Pedro, Emperor of Brazil, now became King of Portugal as well, but knowing that carrying out the duties of both positions would be impossible, Pedro abdicated in Portugal and made his eldest daughter Maria the Queen of Portugal as well as betrothing her to Miguel, his younger brother.

After ruling for 17 years, on 4 October 1967, Sultan Omar Ali Saifuddien willingly abdicated in favour of his eldest son, Sultan Haji Hassanal Bolkiah.

In 1924, however, in the face of increasing attacks by Ibn Saud, Hussein abdicated his secular titles to his eldest son, Ali bin Hussein, who was to become the last Grand Sharif.

Rudhraighe was one of nine known children of Sir Hugh O ' Donnell ( Irish: Aodh mac Maghnusa Ó Domhnaill ), who reigned from 1566 until he abdicated in favour of his eldest son by his second wife, " Red " Hugh O ' Donnell ( Irish: Aodh Ruadh Ó Domhnaill ), in 1592.