The Julii: From Troy to the Ides

The family history of the gens Julia, stated from the record: the Troy chain, the Alban kingdom, the transplant to Rome, the consuls of the Republic, the dictator’s use of the line — and the adoption that put a non-Julian bloodline on the Julian name.

1. The numbers

• Fall of Troy, traditional reckoning: 1184 BC (Eratosthenes’ date). No contemporary record.
• Alba Longa: founded by Iulus in the tradition; ruled by the Silvian kings for roughly 400 years in the traditional king-lists.
• Rome founded, traditional date: 753 BC — by Romulus, of the Alban royal house.
• Alba destroyed and the Julii transplanted to Rome: reign of Tullus Hostilius, Rome’s third king, traditionally c. 673–642 BC.
• First Julius consul: 489 BC. Julii Iuli hold the consulship six times to 434 BC, and a seat among the Ten who wrote the Twelve Tables, 451 BC.
• First Julius Caesar consul: 157 BC.
• The altar at Bovillae, dedicated by the gens “by Alban law”: c. 100 BC. It survives.
• The lex Julia grants citizenship to Rome’s Italian allies: 90 BC. Its author and his brother are killed by the Marian faction: 87 BC.
• The kings-and-gods eulogy: 69 BC. The temple of Venus Genetrix: vowed 48, dedicated 46 BC. The Venus–Aeneas denarius: struck 47–46 BC.
• The male line of the Julii Caesares ends: 15 March 44 BC. The adopted line begins: the will of 13 September 45 BC, opened 18 March 44.
• The last natural son of a Julius Caesar, born outside Roman law, executed: late August 30 BC, on the order of the adopted heir.

2. The claim, and who recorded it

The Julian claim, taken whole: the goddess Venus and the Trojan prince Anchises were the parents of Aeneas; Aeneas escaped the fall of Troy and settled in Latium; his son Ascanius, whom the Julii identified with Iulus, founded Alba Longa; the Alban royal house descended from him; Romulus, founder of Rome, sprang from that house; and the Julii carried its senior blood. The family name was read from Iulus, and Venus Genetrix — Venus the Ancestress — was the family cult.

The claim predates Caesar by centuries and is not Roman in origin. In the Iliad, Poseidon prophesies that Aeneas and his descendants will rule over Trojans in time to come — the seed of the whole tradition, in the oldest Greek epic.

The Aeneas-in-Italy legend runs through the Greek historians; Rome’s earliest historian, Fabius Pictor, writing around 200 BC, carried it; Cato’s Origines, the first history written in Latin, treated the Alban origins. Pictor is lost, the Origines survives in fragments, and both facts are entered in the master register.

The fullest surviving narratives of the chain are Augustan-era and later: Livy’s first book, Dionysius of Halicarnassus, and Virgil’s Aeneid — the epic of the chain, commissioned and written under Augustus, after the name Caesar had become the state. The reader should hold the dates: the tradition is old; its canonical form was written under the dynasty that ruled by it.

3. Troy to Alba, in the tradition

The traditional sequence, stated as tradition. Troy falls — 1184 BC in the reckoning of Eratosthenes, one of several ancient datings.

Aeneas leaves the burning city carrying his father Anchises and the household gods, leads the survivors west, lands in Latium, marries Lavinia, daughter of King Latinus, and founds Lavinium. His son Ascanius — Iulus in the Julian identification — leaves Lavinium and founds Alba Longa in the Alban hills.

The Silvian dynasty descends from him and rules Alba for some four centuries in the king-lists that survive only in late authors.

From that house, in the tradition, comes Rome itself: Numitor, rightful king of Alba, is deposed by his brother; his daughter Rhea Silvia bears the twins Romulus and Remus to Mars; and Romulus founds Rome in 753 BC. The Julian claim therefore contained Rome’s own foundation inside it: the founder of the city and the Julii were, in the tradition, branches of one Alban royal tree.

No contemporary document attests any person in this chain. The lane is tradition end to end, and the family timeline draws it dashed accordingly.

4. The stone at Bovillae

The family’s Alban claim is not only literary. At Bovillae, the town in the Alban hills that inherited Alba Longa’s cults, an altar survives, dedicated by the gens Julia to the god Vediovis, its inscription stating the dedication was made leege Albana — by Alban law. It is dated on its letter-forms to around 100 BC, the generation of the dictator’s birth.

The stone attests three facts at once: that the gens maintained a corporate ancestral cult; that it maintained that cult at the Alban seat; and that it claimed to sacrifice there under the law of the vanished kingdom, five and a half centuries after the kingdom was destroyed. It is the one physical, contemporary document of the family’s own claim, and it is entered in the master register as a source in its own right.

5. Alba destroyed: the Julii come to Rome

Livy’s first book records the event that moved the family: Tullus Hostilius, Rome’s third king, made war on Alba Longa, razed the city, and transplanted its population to Rome — and Livy names the noble Alban houses enrolled into the Roman patriciate, the Julii among them. The traditional reign dates are c. 673–642 BC.

The fact is worth stating plainly: the Julii entered Rome as the transplanted nobility of a royal city that a Roman king had demolished. The family that would end the Republic arrived in Rome, in its own tradition, as the salvage of a destroyed kingdom — carrying, per section 4, that kingdom’s law in its cult for the next five centuries.

6. Kings twice over: the architecture of the eulogy

The claim Caesar spoke at his aunt Julia’s funeral in 69 BC has an exact genealogical architecture, and each half maps to a specific line.

Her mother was a Marcia, of the Marcii Reges — the family whose very cognomen was “Kings” and whose claimed ancestor was Ancus Marcius, fourth king of Rome, himself the grandson of Numa, the second. That is the eulogy’s “descended by her mother from the kings.”

Her father’s side was the Julii: Alba’s royal line, Iulus, Venus. That is the “akin to the immortal gods.” The one surviving fragment of Caesar’s oratory, quoted in full in Caesar, to the Ides, section 6, closes the two lines into one sentence: the sanctity of kings, who hold power among men, and the reverence of gods, who hold power over kings. The speech was a genealogical document, and every element of it corresponds to a claim this memo has now laid out.

7. The Julii in the Republic

The recorded family, from the consular lists. The early Republic belongs to the branch called Julii Iuli: consulships in 489, 482, 473, 447, 435 and 434 BC, and a seat on the Board of Ten that produced the Twelve Tables, Rome’s first written law, in 451. A patrician house present at the Republic’s founding institutions.

Then the fade. For roughly three centuries the family produces almost nothing of consular rank. The branch carrying the cognomen Caesar surfaces in the second century: the first Julius Caesar reaches the consulship in 157 BC. The house that claimed Venus had, by the dictator’s birth, one of the oldest names in Rome and one of the thinnest recent records — the tension stated at the head of the biography’s second section.

The generation before the dictator restored the name on both sides of the era’s divide. Lucius Julius Caesar, consul in 90 BC, carried the lex Julia: citizenship for the Italian allies then in revolt — the widest single extension of the Roman citizen body in the Republic’s history, and the most consequential Julian law before the dictator’s own.

In 87 BC, when the Marian faction took Rome, Lucius and his brother Gaius Julius Caesar Strabo, the orator, were both killed. The young Caesar of the biography was tied to that same Marian faction by his aunt’s marriage. The family stood on both sides of the civil war that formed him.

8. The dictator’s use of the line

Caesar used the family claim in every public medium the age offered, and each use is separately attested. In oration: the eulogy of 69 BC. In cult and architecture: the temple of Venus Genetrix — the Ancestress — vowed at Pharsalus and dedicated in his new forum in 46 BC, where he placed the gilded statue of Cleopatra beside the goddess.

In coinage: the denarius of 47–46 BC, struck for the civil-war armies, with Venus on the obverse and Aeneas on the reverse carrying Anchises and the Palladium — the Troy descent, minted into every soldier’s pay.

And in the rumours of the last months: Suetonius 79 records the report that Caesar intended to move the seat of empire to Alexandria or to Ilium — Troy itself. The report’s truth is not attested; its circulation is. In the same chapter as the Sibylline king-report, the record holds a Rome afraid its ruler would take the state back to the family’s city.

9. The adoption break

The claim this memo has traced runs father to son. Venus to Aeneas, Aeneas to Iulus, Iulus to the Alban kings, the kings’ blood to the Julii: an agnatic chain, transmitted in the male line, which is also how the gens itself, like every Roman gens, was legally constituted.

Gaius Octavius was not in that chain. His father was Gaius Octavius of Velitrae, of the plebeian Octavii. His link to the Julii ran through women, twice: his mother Atia was the daughter of Julia, Caesar’s sister. By blood he was a Julian great-nephew through the female line; in the male line, an Octavius.

The will of 13 September 45 BC adopted him into the family and the name in its closing lines. Roman law treated testamentary adoption as full legal entry into the gens: from the will’s ratification he was, in law, Gaius Julius Caesar. What the law could not create is descent. Two endings must therefore be stated separately, because they are fourteen years apart. In law, the line ended at the Ides of March: no legitimate son existed, none could now be fathered, and the name passed by adoption. In blood, it did not end there.

Two further facts complete the record. The one attested natural son of the dictator, Caesarion, stood outside Roman law entirely (mother’s status, no conubium — the mechanics are in the biography, section 12), and he was executed in Alexandria in late August 30 BC on the order of the adopted heir.

And the dynasty that ruled under the Julian name — Augustus and the Julio-Claudian emperors after him — descended from the Julii, where it descended from them at all, through women. The name conquered; the male line it named was gone.

10. After the Ides: the name becomes the crown

The afterlife of the name, in dates. Octavian ruled as Gaius Julius Caesar from 44, added Augustus in 27 BC, and the Aeneid was written under him — the family chain of sections 2–3 recast as the national epic of the state.

The emperors to Nero (d. AD 68) carried the Julian association; thereafter Caesar ceased to be a family name and became the title itself, worn by every emperor, and passing out of Rome into Kaiser and Tsar. A family cognomen of uncertain etymology, from a house with a thin republican record, became for two thousand years the word for supreme ruler.

11. The missing documents of the family

The family record is missing in listable ways, beyond the general losses stated in the biography, section 17.

• Any contemporary record of the Troy–Alba chain — no document of the second millennium BC attests Aeneas, Iulus, Lavinium’s founding or Alba’s. The earliest surviving full narratives are a millennium and more later. The tradition’s age is real; its documentation is late.
• The records of Alba Longa — the king-lists of the Silvii survive only in late authors; whatever records the city held died with the city, c. 650 BC.
• Fabius Pictor — Rome’s first historian, ~200 BC, who carried the Aeneas tradition. Lost.
• Cato, Origines — the first history in Latin, with the Alban and Italian origins. Fragments only.
• The gens’s own records — every patrician house kept its stemma, its funeral masks and their inscribed lineages, its family archive. Nothing of the Julii’s survives except the Bovillae altar — which is why the altar matters.

12. Sources

Master register numbers refer to the master source register.

1. Livy, Ab Urbe Condita, Book 1 — the Alban chain in Roman narrative; the destruction of Alba and the transplant of its noble houses to Rome, the Julii named among them (1.30). Master register 32.
2. Homer, Iliad, Book 20 — Poseidon’s prophecy that Aeneas’s line will rule: the oldest root of the tradition. Master register 33.
3. The Bovillae altar — the gens Julia’s dedication to Vediovis leege Albana, c. 100 BC; the surviving physical document of the family’s Alban claim. Master register 34.
4. Virgil, Aeneid — the canonical Troy-to-Latium epic, written under Augustus; cited here as the Augustan codification of the chain, and flagged as such. Master register 35.
5. Dionysius of Halicarnassus, Roman Antiquities — the fullest surviving Aeneas-to-Romulus narrative, Augustan era. Master register 36.
6. The consular fasti — the magistrate lists carrying the Julii Iuli (489–434 BC), the decemvir of 451, and the first Caesar consul of 157 BC. Master register 39.
7. Appian, Civil Wars, Book 1 — the Social War, the lex Julia of 90 BC, and the killings of 87 BC. Master register 10.
8. Suetonius — Divus Julius 6 (the eulogy fragment), 79 (the Ilium report); Divus Augustus 4 (Octavius’s parentage: father of Velitrae, mother Atia, daughter of Caesar’s sister Julia), 94 (the birth-omen chapter, for the record contrast). Master register 9.
9. The Venus–Aeneas denarius, 47–46 BC — Venus obverse, Aeneas with Anchises and the Palladium reverse; the descent claim in coinage. Master register 40.
10. Pliny the Elder, Natural History, book 7 — the name etymologies. Master register 24.
11. Verification register. This memo was drafted without live access to the texts. The traditional dates (Troy 1184, Rome 753, the Alban span, Tullus’s reign) follow the standard ancient reckonings; Livy 1.30 for the transplant, Iliad 20 for the prophecy, Suetonius Augustus 4 for the parentage, and the Bovillae altar’s inscription and dating are cited from standard references and are to be checked against the linked editions and the epigraphic literature before revision. The consular dates follow the standard fasti. The coin identification follows the standard catalogues.