Etymologically

praetorianus

Etymology and origin of the Latin word praetorianus

Confidence
Established
Formation
Derivation
First attested
23/24–79 AD, Pliny the Elder
Ultimate origin
Proto-Indo-European (*h₁ei-)
Etymology tree
inherited borrowed derived
Latin eo
French je
Latin comes
French comte
Latin subeo
French subir
Latin pereo
Latin depereo
Latin praeeo
Latin praetor
Latin praetorium
Latin praetorianus
Latin praetorius
Latin nequeo
Latin praetereo
Latin prodeo
Latin redeo
Latin reditus
Latin reditio
Latin obeo
Latin introeo
Latin introitus
Latin adeo
Latin aditus
Latin intereo

Pronunciation

  • Classical: [prae̯.toː.riˈaː.nʊs][1]
  • Ecclesiastical: [pre.to.riˈaː.nus][1]

Forms

praetōriānus (feminine praetōriāna, neuter praetōriānum); first/second-declension adjective[1] Documents and inscriptions also spell it pretorianus.[2]

Etymology

It is from Latin praetōrium (“general's tent; headquarters”) + -ānus.[3][2][4] Wiktionary derives it from praetor with -iānus, and Lewis & Short have a second entry from praetor for the sense of the praetor.[1][5] De Vaan derives praetor from *prai-itōr, “one who goes before”, from prae (“before”) and eō (“to go”), which goes back to Proto-Italic *ei- (“to go”) and Proto-Indo-European *h₁ei- (“to go”).[6]

Earliest recorded meaning

Köbler and Lewis & Short date it from Pliny the Elder, of the praetorian soldiers,[4][5] and Tacitus uses it often.[5]

Semantic evolution

It means belonging to the praetorian cohorts, the emperor's bodyguard, and as a noun a soldier of those cohorts; the plural praetōriānī are the praetorian guard.[3][5] Suetonius speaks of the praetorian army, and the epitome of Aurelius Victor of the praetorian prefecture.[5] In later law and in Augustine it also means belonging to the praetor, as a praetorian guardian in Ulpian and the fees of a praetor's court.[5][4]

Timeline

  • 23/24–79 AD – Pliny the Elder of praetorian soldiers.[5][4]
  • 98–115 AD – Tacitus of the praetorian guards.[5][4]
  • c. 75–c. 150 AD – Suetonius of the praetorian army.[5][4]
  • 354–430 AD – Augustine of fees of the praetor's court.[5][4]

Meanings

Adjective

  1. Of or belonging to the praetorian cohorts, the emperor's bodyguard.[3][5][1]
  2. (Late Latin) Of or belonging to the praetor.[5][4]

Noun

  1. A soldier of the praetorian cohorts; in the plural, the praetorian guard.[3][5]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  3. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b c d e f g h Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c d e f g h i j k l m Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
Cite this entry

“Praetorianus.” Etymologically, 19 Oct. 2026, etymologically.com/la/praetorianus. Accessed 20 Oct. 2026.

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