Etymologically

Etymology and origin of the Latin word triumvir

Confidence
Established
Formation
Compound
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin trēs,vir
Etymology tree
inherited borrowed derived
Latin tres
French trois
Italian tre
Latin triumvir
From the same root
Latin triens ← tres
French troisième ← trois
Latin triumviralis ← triumvir

Pronunciation

  • Classical: [triˈʊn.wɪr][1]
  • Ecclesiastical: [triˈum.vir][1]

Forms

triumvir m (genitive triumvirī); second declension[1] In the plural it is also written as two words, ⟨trēs virī⟩, and inscriptions often write it ⟨iiivir⟩.[2][3]

Etymology

It is from Latin trēs (“three”) + vir (“man”).[2][4] The OLD explains the first part ⟨trium-⟩ from the genitive plural, used partitively for one of the three men,[2] and Etymonline derives the word from the Old Latin phrase ⟨trium virum⟩.[5] The numeral goes back to Proto-Indo-European *treies (“three”), and the noun to Proto-Italic *wiro- and Proto-Indo-European *uiH-ró- (“man, warrior”).[6]

Earliest recorded meaning

Plautus already has the board under the name tresviri, the officials who could shut a man in prison,[2][3] and a speech of Cato uses the word of a commissioner sent to found a colony.[2]

Semantic evolution

It was the title of members of several boards of three.[2][7] The triumviri capitales had charge of prisons and executions, and as triumviri nocturni kept the peace at night;[2] Valerius Maximus tells of one accused because he had made his night rounds carelessly.[2] Others ran the mint, distributed land when a colony was founded, as in Cicero, Sallust and Livy, or, as the triumviri mensarii appointed in 216 BC, supervised public finance; the senate also set up boards of three for particular tasks.[2][7]

In 43 BC Antony, Octavian and Lepidus were appointed triumviri rei publicae constituendae, and Augustus records in his Res Gestae that the people made him one of them.[2][8] Under the Empire it was also the title of local magistrates in the provinces, of officials of the Augustales, and even of an officer in a guild of slaves.[2] British medieval writers used it as a title of dignity or office,[9] and English took it over in the mid-15th century.[5]

Timeline

  • c. 250–184 BC – Plautus names the tresviri who keep the prison.[2][4]
  • 234–149 BC – Cato uses it of a commissioner for a colony.[2][4]
  • 216 BC – The triumviri mensarii are appointed for public finance, as Livy reports.[2]
  • 43 BC – Antony, Octavian and Lepidus become the triumvirs for restoring the state.[2]
  • mid-15th century – English borrows it as triumvir.[5]

Meanings

Noun

  1. A member of a board of three officials, especially one of the triumviri capitales, who had charge of prisons and executions.[2][3]
  2. A member of a board of three for the mint, for founding a colony and dividing its land, for public finance, or for some other task.[2][7][8]
  3. One of the three men (Antony, Octavian and Lepidus) appointed in 43 BC to restore the state; a triumvir.[2][7]
  4. The title of various local magistrates in the provinces and of officials of the Augustales.[2]
  5. An officer of a guild of slaves.[2]
  6. (Medieval Latin) A title of dignity or office.[9]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  4. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  7. ^ a b c d Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  8. ^ a b Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  9. ^ a b 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

Derived terms

Cite this entry

“Triumvir.” Etymologically, 20 Oct. 2026, etymologically.com/la/triumvir. Accessed 22 Oct. 2026.

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