Etymology and origin of the Latin word Dacus
- Confidence
- Uncertain
- First attested
- c. 50 BC Caesar, in the plural More words from the 1st century BC
- Ultimate origin
- Latin Dacia,-us
Forms
Dācus m (genitive Dācī, feminine Dāca); second declension[1]
Etymology
The origin is uncertain.[2] Wiktionary takes it as formed from Latin Dācia + -us, from the name of the country.[1] Georges instead treats ⟨Dācia⟩ as formed from the people's name, the plural ⟨Dācī⟩.[3] Köbler calls the name of unclear origin, perhaps Thracian.[2]
Ancient writers explained it differently: Isidore of Seville held that the Dacians were offspring of the Goths and that their name stood for ⟨Dagi⟩, because they came of Gothic stock.[4][5]
Earliest recorded meaning
Caesar uses the plural Dācī for the Dacians, a warlike people related to the Getae,[3][6][2] and Virgil has the singular Dācus as a collective for the people.[3][6]
Semantic evolution
In Classical Latin the word is both a noun, usually in the plural, for an inhabitant of Dācia, and an adjective, “Dacian”.[7][8] The singular is often collective in the poets,[3] and a feminine Dāca is found in Venantius Fortunatus and in an inscription.[3]
In medieval Britain the name was transferred to the Danes: Domesday Book names men called Dacus, and chroniclers use the plural for the Danish invaders.[9][2] From this came an adjective “Danish” and, used as a noun, a name for the Danish axe or pole-axe.[9][2] A medieval Hungarian source has dacus for a kind of short sword.[10]
Timeline
- c. 50 BC – Caesar names the Dacians, in the plural Dācī.[3][2]
- 70–19 BC – Virgil uses the singular Dācus for the people in the Georgics.[3][6][2]
- c. 45–96 AD – Statius uses it as an adjective, “Dacian”.[6][2]
- c. 560–636 AD – Isidore of Seville connects the Dacians with the Goths.[4][2]
- 1086 – Domesday Book uses it for a Dane.[9][2]
- 1461 – A medieval text uses it as an adjective, “Danish”.[2]
Meanings
Noun
- A Dacian, an inhabitant of Dacia; usually in the plural, the Dacians.[7][3][8]
- (Medieval Latin) A Dane.[9][2]
- (Medieval Latin) A Danish axe, a pole-axe.[9]
- (Medieval Latin) A short sword.[10]
Adjective
Related words
- Dācia
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l m Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d e f g h Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ Isidore of Seville, Etymologiarum sive Originum libri XX, ed. W. M. Lindsay (Oxford, 1911).
- ^ a b c d e Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
- ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
- ^ a b c d e f Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
- ^ a b Bartal, Antal, et al. (1987–), Lexicon Latinitatis Medii Aevi Hungariae, Budapest: Akadémiai Kiadó; online ed. ELTE
- ^ VoLat: Vocabolario della Lingua Latina (2018), Milan: Hoepli
Cite this entry
“Dacus.” Etymologically, 13 Nov. 2026, etymologically.com/la/Dacus. Accessed 14 Nov. 2026.
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