This article lists monarchs who were documented to have mental illness. Such allegations are not necessarily conclusive, since the documenters might have written from political biases or rumor.
Tiberius Claudius Caesar Augustus Germanicus was a Roman emperor, ruling from AD 41 to 54. A member of the Julio-Claudian dynasty, Claudius was born to Drusus and Antonia Minor at Lugdunum in Roman Gaul, where his father was stationed as a military legate. He was the first Roman emperor to be born outside Italy.
Gaius Caesar Augustus Germanicus, better known by his nickname Caligula, was Roman emperor from AD 37 until his assassination in AD 41. He was the son of the Roman general Germanicus and Agrippina the Elder, Augustus' granddaughter, members of the first ruling family of the Roman Empire. He was born two years before Tiberius was made emperor. Gaius accompanied his father, mother and siblings on campaign in Germania, at little more than four or five years old. He had been named after Gaius Julius Caesar, but his father's soldiers affectionately nicknamed him "Caligula".
The Julio-Claudian dynasty comprised the first five Roman emperors: Augustus, Tiberius, Caligula, Claudius, and Nero.
Tiberius Julius Caesar Augustus was Roman emperor from AD 14 until 37. He succeeded his stepfather Augustus, the first Roman emperor. Tiberius was born in Rome in 42 BC to Roman politician Tiberius Claudius Nero and his wife, Livia Drusilla. In 38 BC, Tiberius' mother divorced his father and married Augustus. Following the untimely deaths of Augustus' two grandsons and adopted heirs, Gaius and Lucius Caesar, Tiberius was designated Augustus' successor. Prior to this, Tiberius had proved himself an able diplomat, and one of the most successful Roman generals: his conquests of Pannonia, Dalmatia, Raetia, and (temporarily) parts of Germania laid the foundations for the empire's northern frontier.
Antonia Minor was the younger of two surviving daughters of Mark Antony and Octavia Minor. She was a niece of the Emperor Augustus, sister-in-law of the Emperor Tiberius, paternal grandmother of the Emperor Caligula and Empress Agrippina the Younger, mother of the Emperor Claudius, and maternal great-grandmother of the Emperor Nero. She outlived her husband Drusus, her oldest son, her daughter, and several of her grandchildren.
Lucius Aelius Sejanus, commonly known as Sejanus, was a Roman soldier, friend, and confidant of the Roman Emperor Tiberius. Of the Equites class by birth, Sejanus rose to power as prefect of the Praetorian Guard, the imperial bodyguard, of which he was commander from AD 14 until his execution for treason in AD 31.
Gaius Caesar was a grandson and heir to the throne of Roman emperor Augustus, alongside his younger brother Lucius Caesar. Although he was born to Marcus Vipsanius Agrippa and Julia, Augustus' only daughter, Gaius and Lucius were raised by their grandfather as his adopted sons and joint-heirs. He experienced an accelerated political career befitting a member of the Julio-Claudian dynasty, with the Roman Senate allowing him to advance his career without first holding a quaestorship or praetorship, offices that ordinary senators were required to hold as part of the cursus honorum.
Otto was King of Bavaria from 1886 until 1913. However, he never actively ruled because of alleged severe mental illness. His uncle, Luitpold, and his cousin, Ludwig, served as regents. Ludwig deposed him in 1913, a day after the legislature passed a law allowing him to do so, and became king in his own right as Ludwig III.
The gens Claudia, sometimes written Clodia, was one of the most prominent patrician houses at ancient Rome. The gens traced its origin to the earliest days of the Roman Republic. The first of the Claudii to obtain the consulship was Appius Claudius Sabinus Regillensis, in 495 BC, and from that time its members frequently held the highest offices of the state, both under the Republic and in imperial times.
The gens Julia was one of the most prominent patrician families in ancient Rome. Members of the gens attained the highest dignities of the state in the earliest times of the Republic. The first of the family to obtain the consulship was Gaius Julius Iulus in 489 BC. The gens is perhaps best known, however, for Gaius Julius Caesar, the dictator and grand uncle of the emperor Augustus, through whom the name was passed to the so-called Julio-Claudian dynasty of the first century AD. The nomen Julius became very common in imperial times, as the descendants of persons enrolled as citizens under the early emperors began to make their mark in history.
Pater Patriae was an honorific title in ancient Rome. In Latin, it means "father of the country", or more literally, "father of the fatherland".
Gnaeus Domitius Ahenobarbus was a member of the imperial Julio-Claudian dynasty of Ancient Rome. Domitius was the son of Antonia Major. He married Agrippina the Younger and became the father of the emperor Nero.
Vipsania Julia Agrippina nicknamed Julia Minor and called Julia the Younger by modern historians, was a Roman noblewoman of the Julio-Claudian dynasty. She was emperor Augustus' first granddaughter, being the first daughter and second child of Julia the Elder and her husband Marcus Vipsanius Agrippa. Along with her siblings, Julia was raised and educated by her maternal grandfather Augustus and her maternal step-grandmother Livia Drusilla. Just like her siblings, she played an important role in the dynastic plans of Augustus, but much like her mother, she was disgraced due to infidelity later on in her life.
Scribonia was the second wife of Octavian, later the Roman Emperor Augustus, and the mother of his only biological child, Julia the Elder. Through her youngest daughter she was the mother-in-law of the Emperor Tiberius, great-grandmother of the Emperor Caligula and Empress Agrippina the Younger, and great-great-grandmother of the Emperor Nero.
Julia the Elder, known to her contemporaries as Julia Caesaris filia or Julia Augusti filia, was the daughter and only biological child of Augustus, the first Roman Emperor, and his second wife, Scribonia. Julia was also stepsister and second wife of the Emperor Tiberius; maternal grandmother of the Emperor Caligula and the Empress Agrippina the Younger; grandmother-in-law of the Emperor Claudius; and maternal great-grandmother of the Emperor Nero. Her epithet "the Elder" distinguishes her from her daughter, Julia the Younger.
De vita Caesarum, commonly known as The Twelve Caesars, is a set of twelve biographies of Julius Caesar and the first 11 emperors of the Roman Empire written by Gaius Suetonius Tranquillus. The group are: Julius Caesar, Augustus, Tiberius, Caligula, Claudius, Nero, Galba, Otho, Vitellius, Vespasian, Titus, Domitian.
Marcus Furius Camillus was a Roman senator and a close friend of the emperor Tiberius. Despite being without previous military experience, he enjoyed several successes against the Numidian rebel Tacfarinas while serving as governor of Africa, and was even praised in public by the Emperor and awarded triumphal honours. The historian Tacitus, in his Annales, joked that Camillus subsequently lived invisibly enough to survive this great honour.
Marcus Junius C. f. M. n. Silanus was an Ancient Roman senator who became suffect consul in AD 15. His daughter Junia Claudilla was the first wife of Emperor Caligula.
Gnaeus Cornelius Lentulus "Augur" was a politician and general of the early Roman Empire during the reign of Augustus, who became consul in 14 BC as the colleague of Marcus Licinius Crassus Frugi. Enormously wealthy, he reputedly was forced by emperor Tiberius to commit suicide in 25 AD.
Tiberius Claudius Drusus was the eldest son of the Roman Emperor Claudius with his first wife Plautia Urgulanilla. He had one younger sister, Claudia, who was repudiated by Claudius along with Plautia.