Etymologically

Etymology and origin of the French word sieur

Confidence
Established
Formation
Inherited
First attested
1292 charter of Parthenay More words from the 13th century
Inherited from
Latin *seiorem via Old French
Ultimate origin
Latin senior

Pronunciation

Forms

sieur m (plural sieurs)[1] Old French sor, seur (mon sor, mon seur).[2][3]

Etymology

It is inherited from Old French sieur, inherited from Vulgar Latin *seiōrem, from Latin senior (“elder”).[2][3][1] It was the old oblique case of sire, the nominative.[2][3][4] The accusative of the full Latin form gave seigneur,[1][3] and Littré took “sieur” for a contraction of that word.[5] The corresponding Old Occitan forms were seior (1187) and siere (about 1250).[3][2]

Cognate with Spanish señor and Italian signore.[1]

Earliest recorded meaning

Its first record, in a 1292 charter of Parthenay, means “lord”;[2][6] the Grand Robert dates the word to 1242, and the variant mon sor was a title given to a saint in 1260.[4][3][2]

Semantic evolution

The sense “lord of an estate” became archaic in the classical period but is still recorded in 1798; it widened to “owner (of a house, of a woman)” about 1430.[3][5] It was a title of honour for a saint, a nobleman, a prelate (16th century) and, more modestly, a merchant (1679), and stayed in use until the Revolution.[3][2]

Villon used it for a dupe (1457), and it is still used scornfully or ironically before a man's name (1644, Scarron).[3][2] The Académie in 1694 limited its ordinary use to pleadings and public deeds, where it still stands before a man's name in legal style.[2][3] The compound monsieur, first monsor (1297), became an independent word once the final ⟨r⟩ of sieur was no longer pronounced.[3]

Timeline

  • 1260 – Mon sor is used as a title for a saint.[2][3]
  • 1292 – A charter of Parthenay uses sieur for “lord”.[2]
  • 1297 – Monsor is recorded.[3]
  • c. 1430 – It means the master of a house.[3][5]
  • 1457 – Villon uses it for a dupe.[3]
  • 1644 – Scarron uses it ironically.[2][6]
  • 1694 – The Académie records it as a title used in legal pleadings and deeds.[2][6]

Meanings

Noun

  1. (archaic) A title of honour for a man of some rank, often with the name of an estate: le sieur de Vauban.[2][6]
  2. (law) A title placed before a man's name in legal documents, equivalent to monsieur: le sieur Martin.[7][5][6]
  3. (ironic, pejorative) Used scornfully before a man's name.[7][6]

Word family

Usage notes

The Petit Robert notes the homophone scieur “sawyer”.[7]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n Trésor de la langue française informatisé (2004), ATILF – CNRS & Université de Lorraine, atilf.fr/tlfi; electronic version of Imbs, Paul; Quemada, Bernard, eds. (1971–1994), Trésor de la langue française, Paris: CNRS / Gallimard
  3. ^ a b c d e f g h i j k l m n o Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  4. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  5. ^ a b c d Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  6. ^ a b c d e f Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  7. ^ a b c Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Sieur.” Etymologically, 14 Nov. 2026, etymologically.com/fr/sieur. Accessed 15 Nov. 2026.

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