Gaius Julius Caesar () was a prominent name of the Gens Julia from Roman Republican times, borne by a number of figures, most notably by the general and dictator Gaius Julius Caesar.

Julius Caesar's name

The name Caesar probably originated in Italy from a dialect of Latium which did not share the rhotacism of the Roman dialect.L.R. Palmer, The Latin language (Bristol 1954), p. 69. (That is, the s between vowels did not change to r.) Using the Latin alphabet as it existed in the day of Julius Caesar (100 BC – 44 BC) (i.e., without lower case letters, "J", or "U"), Caesar's name is properly rendered GAIVS IVLIVS CAESAR (the spelling CAIVS is also attested and is interchangeable with the more common GAIVS; however the letter C was used with its antique pronunciation of [g], as it was an adaptation of Greek gamma). It is often seen abbreviated to C. IVLIVS CÆSAR. (The letterform Æ is a ligature, which is often encountered in Latin inscriptions, where it was used to save space, and is nothing more than the letters "ae".) The leading vowels in each part of the name are long, and in Classical Latin, the whole name was pronounced , or, alternatively, with praenomen pronounced trisyllabically as . In Greek, during Caesar's time, his name was written , which was pronounced more or less the same.

Roman nomenclature is somewhat different from the modern English form. Gaius, Iulius, and Caesar are Caesar's praenomen, nomen, and cognomen, respectively. In modern English usage, his full name might be something like "Gaius Caesar of the Juliuses", where 'Caesar' denoted him as a member of the 'Caesarian' family branch of the 'Julius' clan or gens Julia in proper Latin, and 'Gaius' was his personal name. Though contemporary writers almost always referred to him as "Gaius Caesar," the name's historical usage was not the same as it is in the 21st century. Caesar's grand-nephew, Gaius Octavius Thurinus, duly took the full name "Gaius Julius Caesar" upon Caesar's posthumous adoption of him in 44 BC (while legally he should have been "Gaius Julius Caesar Octavianus", and was/is called as such by contemporaries and historians, he himself never used either of his original surnames again), and the name of Caesar became fused with the imperial dignity after Octavianus became the first Roman Emperor, Augustus; in this sense it is preserved in the German and Bulgarian words Kaiser and Tsar (sometimes spelled Czar), both of which refer to an emperor. Compare the Hungarian, Slavic and Turkish words for "king", forms of kral, all adapted from Karl, the personal name of Charlemagne.

The name of the dictator Julius Caesar—Latin script: CAIVS IVLIVS CAESAR—was often extended by the official filiation Gai filius ("son of Gaius"), rendered as Gaius Iulius Gai filius Caesar. A longer version can also be found, however rarely: Gaius Iulius filius nepos Caesar ("Gaius Julius Caesar, son of Gaius, grandson of Gaius").The occurrence of the double i, as e.g. in Iulii or Gaii, was customary for Latin writings after the end of the Republic. The single i (Iuli, Gai etc.) is Republican Latin. Caesar spoke of himself only as Caius Caesar,Caius is the old-Latin variant of Gaius (see also below). omitting the nomen gentile Iulius.Plutarchus, Caesar 46; Suetonius, Divus Iulius 30 After his senatorial consecration as Divus Iulius in 42 BC, the dictator perpetuo bore the posthumous name Imperator Gaius Iulius Caesar Divus (IMP•C•IVLIVS•CAESAR•DIVVS, best translated as "Commander [and] God Gaius Julius Caesar"), which is mostly given as his official historical name.Augustus would eventually follow the use of Imperator as a praenomen. For Caesar's precedent see Gaius Suetonius Tranquillus, Divus Iulius 76 : since Imperator here is a true praenomen, a translation ("commander") should—if at all—only be given for explanatory purposes. The same would apply for Divus ("god"), which derived from Caesar's god name Divus Iulius (at the latest since early 44 BC), and is therefore (as part of his name) per se untranslatable. Suetonius also speaks of the additional title Pater Patriae,Gaius Suetonius Tranquillus, Divus Iulius 76 ; the neuter variant Parens Patriae is also known from a statue of Caesar in Rome. which would render Caesar's complete name as Imperator Gaius Iulius Caesar Pater Patriae Divus.

The praenomen Gaius Gaius is an archaic Latin name and one of the earliest Roman praenomina. Before the introduction of the letter 'G' into the Latin alphabet, i.e. before the censorship of Appius Claudius Caecus in 312 BC,RE XVI 1661 the name was only written as Caius. The old spelling remained valid in later times and existed alongside Gaius, especially in the form of the abbreviation C.

The only known original Roman etymology of Gaius is expressed as a gaudio parentum,Auct. de praen. 5: Gai iudicantur dicti a gaudio parentum; quoted in Paulus Diaconus, abridged summary of Sextus Pompeius Festus, De Verborum Significatu meaning that the name Gaius stems from the Latin verb gaudere ("to rejoice", "to be glad"). This etymology is commonly seen as incorrect, and the origin of Gaius is often stated as still unknown.Cp. e.g. RE XVI 1668, pp. 14ff; Frederic D. Allen, "Gajus or Gaius?", Harvard Studies in Classical Philology, Vol. 2, 1891, pp. 71–87 Some have linked the name to an unknown Etruscan phrase, others to the gentilician name Gavius, which possibly might have lost the medial v in the course of time.Proposed e.g. by George Davis Chase, "The Origin of Roman Praenomina", Harvard Studies in Classical Philology, Vol. 8, 1897, pp. 103–184 But no supporting evidence has been found to this day.

The nomen Iulius VirgilPublius Vergilius Maro, Aeneid 1.272 & 6.756 and his commentator ServiusMaurus Servius Honoratus, Commentary on the Aeneid of Vergil 1.267 wrote that the gens Iulia had received their name Iulius from the family's common ancestor, Aeneas' son Ascanius,Sextus Pompeius Festus, De verborum significatu 340 M. (460 L.); RE 10.106 & 953 who was also known under his cognomen Iulus, which is a derivative of iulus, meaning "wooly worm".Later used by Pliny for the wooly part of a plant; early form: Iullus Such nicknames were typical for cognomina and were the base of old gentilician names.E.g. claudus ("lame", "crippled") for Claudius, Petro ("bumpkin", "fool") for Petronius etc. By tracing their descent from Aeneas, the Iulii belonged to the so-called "Trojan" families of Rome.

Weinstock (1971) made a case for Iullus being a diminutive, i.e. juvenescent theophoric name of Iovis, which used to be one of the older names of the god Iuppiter. Weinstock's argument however relies on a hypothetical intermediate form *Iovilus, and he stated himself that Iullus can't originally have been a theophoric name and could therefore only have become one at a secondary stage, after the Julians had established the identification of Iulus as their gentilician god Vediovis (also: Veiovis), who was a "young Iuppiter" himself.Verrius Flaccus: Paul. 379 M. (519 L.); Ovid F. 3.437 (on Veiovis on the Capitol). Aeneas had been divinized as Iuppiter indiges, which supported the identification of Aeneas' son Iulus as the "young Iuppiter" Vediovis, especially since Iulus had inaugurated Aeneas' cult and had built him a temple in Alba Longa. Therefore, Alföldi (1975) is correct in rejecting this proposed etymological origin.

Members of the Julian family later connected the name Iulus with ἰοβόλος ("the good archer") and ἴουλος ("the youth whose first beard is growing").Servius, Commentary on the Aeneid 1.267. This has however no etymological value and is only a retrofitting interpretation concerned with the earlier institution of the Vediovis-cult in Rome together with a statue of Iulus-Vediovis as a (possibly bearded) archer.Cf. the identification of Vediovis with Iuppiter and Apollo (see above; Rev. Num. 1971; Chiron 2, 1972; Sydenham 76 et al.). Others derived Iulius from King Ilus, who was the founder of Ilion (Troy).Verg. Aen. 1.267, in: Servius (and Dan.) Commentary on the Aeneid 1.267. Weinstock called these the "usual playful etymologies of no consequence"."Divus Julius", Oxford 1971, p. 9.

The cognomen Caesar

In earlier times Caesar could originally have been a praenomen.Auct. de praen. 3. Quoted in Stefan Weinstock: Divus Julius (Oxford 1971/2004). The suffix –ar is highly unusual for Latin, but is a common suffix in the Sabine Oscan language, spoken in Southern Italy up to the 1st century AD. The etymology of the name Caesar is still unknown and was subject to many interpretations even in antiquity. Julius Caesar himself may have propagated the derivation from the elephant, an animal that was said to have been called caesai in the "Moorish", i.e. probably Punic language,Historia Augusta, Aelius 2.3; Servius, Commentary on the Aeneid 1.286 i.a.; cp. Pauly-Wissowa RE X 464 sq. thereby following the claims of his family that they inherited the cognomen from an ancestor, who had received the name after killing an elephant (presumably a war elephant), possibly during the first Punic War (264–241 BC). Since the Gauls came to know the elephant through the Punic commander Hannibal, it is possible that the animal was also known under the name caesar or in Gaul. Caesar used the animal during his conquest of Gaul and probably of Britain,Polyaenus (Stratagems 8:23.5) tells the story about Caesar using an armoured elephant during his expeditions at the river Thames. which is further supported by the inclusion of forty elephants on the first day of Caesar's Gallic triumph in Rome.Suetonius, Divus Iulius 37.2 . In addition Cassius Dio (43.22.1) mentions elephants as part of Caesar's entourage after a banquet in Rome on the fourth day of the same triumph. Caesar displayed an elephant above the name CAESAR on his first denarius, which he probably had minted while still in Gallia Cisalpina. Apart from using the elephant as a claim for extraordinary political power in Rome,Artemidorus established that the elephant, undoubtedly a symbol of honor (and arrogance), denoted a δεσποτης (despotēs, lord"), a βασιλευς (basileus, "imperator [of Rome]"; "king [in Greece]) or a και ανηρ μεγιστος (kai anēr megistos, "man in high authority") on the Italian mainland. Therefore the coin would have to be seen as a presage for Caesar's future dominion. (From Stevenson et al.: A Dictionary of Roman Coins: Republican and Imperial. London 1889.) the coin is an unmasked allusion to this etymology of the name and directly identifies Caesar with the elephant, because the animal treads a Gallic serpent-horn, the carnyx, as a symbolic depiction of Caesar's own victory.Cf. Christoph Battenberg, Pompeius und Caesar: Persönlichkeit und Programm in ihrer Münzpropaganda (In German), Marburg/Lahn 1980. Furthermore the elephant was a counter-symbol against the gens Caecilia, whose heralding symbol was the elephant, attesting victories gained by the Metelli in Sicily (250 BC) and Macedonia (148 BC). In 49 BC Metellus Scipio had ordered Caesar to surrender his army, although Pompeius was levying troops, and the Metelli had also tried to stop Caesar from confiscating the state treasury in the Temple of Saturn, where Caesar eventually had his coins struck. Therefore Caesar's propaganda communicated not only the taking of the treasure but also the taking of his enemies' symbol and placed his own victory over Gaul above the Metellan victories.

Several other interpretations were propagated in antiquity, all of which remain highly doubtful: