Constantine's birth name was Heraclius the New Constantine (, ), which was also the official name under which he reigned.

* Marcellinus ( magister militum ) ( d. c. 468 ) a Roman general who took part in the invasion of Africa against Geiseric, together with Heraclius and Basiliscus

Heraclius or Eraclius ( c. 1128 – 1190 / 1191 ), was archbishop of Caesarea and Latin Patriarch of Jerusalem.

Generally, it can be thought of as from the end of the Roman Empire's Crisis of the Third Century ( c. 235 – 284 ) to the re-organization of the Eastern Roman Empire under Heraclius and the Muslim conquests in the mid-7th century.

* Saints Martin and Heraclius, of Illyria ( 4th c .)

Heraclius, son to the exarch of Africa, set sail for the city and assumed the purple.

The citizens lost their right to free grain in 618 when Heraclius realised that the city no longer could be supplied from Egypt as a result of the Persian wars: the population dropped substantially in size as a result.

While the city withstood a siege, Heraclius campaigned deep into Persian territory and briefly restored the status quo in 628, when the Persians surrendered all their conquests.

In 630, Emperor Heraclius marched triumphantly into Jerusalem and restored the True Cross to the rebuilt Church of the Holy Sepulchre.

* 627 – Battle of Nineveh: A Byzantine army under Emperor Heraclius defeats Emperor Khosrau II's Persian forces, commanded by General Rhahzadh.

Of particular note was the translation of the Latin Imperator into the Greek Basileus, after Emperor Heraclius changed the official language of the empire from Roman to Greek in 620 AD.

In 610, though, Heraclius took the throne of Constantinople and began a successful counter-attack, expelling the Persians and invading Media and Assyria.

The Byzantine Emperor, Heraclius, promised to restore Jewish rights and received Jewish help in defeating the Persians, but he soon reneged on the agreement after reconquering Palestine by issuing an edict banning Judaism from the Byzantine Empire.

His rise to power began in 608, when he and his father, Heraclius the Elder, the exarch of Africa, successfully led a revolt against the unpopular usurper Phocas.

Heraclius ' reign was marked by several military campaigns.

The year Heraclius came to power, the empire was threatened on multiple frontiers.

Heraclius immediately took charge of the ongoing war against the Sassanids.

However, because Constantinople was protected by impenetrable walls and a strong navy, Heraclius was able to avoid total defeat.

Heraclius drove the Persians out of Asia Minor and pushed deep into their territory, defeating them decisively in 627 at the Battle of Nineveh.

Serving their partner in wars against the Abbasid Caliphate, Khazars aided the Byzantine emperor Heraclius ( reigned 610 – 641 ) by sending an army of 40, 000 soldiers in their campaign against the Persians in the Byzantine – Sassanid War of 602 – 628.

When Patriarch Amalric died on 6 October 1180, the two most obvious choices for his successor were William of Tyre and Heraclius of Caesarea.

They were fairly evenly matched in background and education, but politically they were allied with opposite parties, as Heraclius was one of Agnes of Courtenay's supporters.

The canons of the Holy Sepulchre asked the king for advice, and Heraclius was chosen through Agnes ' influence.

There were rumours that Agnes and Heraclius were lovers, but this information comes from the partisan 13th-century continuations of William of Tyre's history, and there is no other evidence to substantiate such a claim.

In 1184, Patriarch Heraclius travelled throughout the courts of Europe, but no help was forthcoming.

Heraclius offered the " keys of the Holy Sepulchre, those of the Tower of David and the banner of the Kingdom of Jerusalem ", but not the crown itself, to both Philip II of France and Henry II of England ; the latter, as a grandson of Fulk, was a first cousin of the royal family of Jerusalem, and had promised to go on crusade after the murder of Thomas Becket.

During the lengthy siege, which lasted until 1191, Patriarch Heraclius, Queen Sibylla and her daughters, and many others died of disease.

When the Byzantine or Eastern Roman emperor Heraclius ejected the Persians in 630 AD, he expelled the city's Jews.

* Heraclius ( 575 – 641 ) Emperor from 610 to 641

* Cyril Leo Heraclius, Prince Toumanoff ( born Toumanishvili ) ( 1913 – 1997 ), Russian-born historian and genealogist who was a Professor Emeritus at Georgetown University

* 455 – Heraclius, Western Roman courtier

* 610 – Heraclius arrives by ship from Africa at Constantinople, overthrows Byzantine Emperor Phocas and becomes Emperor.

* 610 – Coronation of Byzantine Emperor Heraclius.

* December 12 – Battle of Nineveh: Emperor Heraclius defeats the Persians, ending the Roman-Persian Wars.

* January – Third Perso-Turkic War: Emperor Heraclius ravages the environs of Ctesiphon ; Tong Yabghu of the Western Gokturks storms and sacks Tbilisi.

* October 4 – Heraclius arrives by ship from Africa at Constantinople, overthrows East Roman Emperor Phocas and becomes Emperor.

* Byzantine Empire: August – Justinian II and his ally, the Bulgar khan Tervel, by-pass the Byzantine forces under Heraclius awaiting them and reach Constantinople.

* At request of Porga of Croatia, one of the first known princes () of Dalmatian Croatia to Emperor Heraclius for Christian teachers, Pope John IV ( 640 – 642 ) sent Christian teachers and missionaries to the Croatian Provinces.

* February 11 – Byzantine Emperor Heraclius dies.

* February 11 – Heraclius, Byzantine emperor

* May 3 – Heraclius Constantine, first son of Byzantine Emperor Heraclius, and himself a future Emperor

* Autumn – winter – The Byzantine general Heraclius, brother of Tiberius III, launches a campaign into Syria, defeats an army from Antioch and raids as far as Samosata.

By the early 7th century, the official government language segued into Greek during the lengthy reign of Heraclius ( 610 – 641 ).

The Council settled a set of theological controversies that go back to the sixth century but had intensified under the Emperors Heraclius ( 610 – 641 ) and Constans II ( 641 – 668 ).

Cherub and Heraclius receiving the submission of Khosrau II ; plaque from a cross ( Champlevé Vitreous enamel | enamel over gilt copper, 1160 – 1170, Paris, Louvre ).

Constantinus Heraclius (), known in English as Heraklonas, Heraclonas, or Heracleonas ( 626 – 641 ), was the son of Heraclius and his niece Martina, and was Byzantine Emperor briefly between February and September 641.