Etymologically

Etymology and origin of the Catalan word cosí

Confidence
Probable
Formation
Inherited
First attested
1034 a will in the cartulary of Sant Cugat, as the feminine cusina More words from the 11th century
Inherited from
Latin consobrinus
Ultimate origin
Latin cōnsobrīnus
Etymology tree
inherited borrowed derived
Latin sobrīnus
Spanish sobrino
Catalan cosí
French cousin
From the same root
Latin cusinus ← cōnsobrīnus

Pronunciation

  • Balearic, Central, Northern: [kuˈzi][1]
  • Northwestern, Valencia: [koˈzi][1]

Forms

cosí m (plural cosins, feminine cosina, feminine plural cosines)[1] The DCVB records /kuˈzi/, /koˈzi/ and /koˈsi/; the feminine is cosina.[2] Eivissa says cusí, and the Capcir kuzís in the plural.[3] The form with final /n/, cosin germà, lasted long and is still alive from the Ebre to the south of Valencia and in Mallorca and Menorca.[3]

Etymology

It is inherited from Latin cōnsobrīnus (“cousin, child of a mother's sister”), altered in a way that is not fully explained.[3][2][1] Coromines thinks the phrase ⟨consobrinus primus⟩ “first cousin” was contracted in Vulgar Latin to *consoprimus, then reshaped as ⟨cosimprimo⟩ and finally ⟨cosin⟩ once ⟨primo⟩ “first” was dropped;[3][4] Bruguera and the GDLC give the stages ⟨cosob(r)inprimu⟩, ⟨cosuinprimu⟩, ⟨cosinprim⟩, ⟨cosin⟩, when ⟨cosí prim⟩ alternated with ⟨cosí segon⟩.[3][4][5]

The same word is Occitan cosin, French cousin and Italian cugino.[3][6] The REW takes the Italian word from French, while Coromines regards it as the regular native outcome.[6][3] Spanish shortened the same phrase the other way, to Spanish primo.[3][1]

The Latin word is formed con- and sobrīnus.[1][7]

Earliest recorded meaning

The first record is the feminine cusina, in a will of 1034 in the cartulary of Sant Cugat whose passage is wholly Catalan: the testator leaves a red berregà to Ermengars, cusina sua.[3] The masculine appears in Latin dress, meo cusino, twice in a Barcelona document of 1076.[3]

Semantic evolution

From the 13th century cosí germà named the first cousin, the child of brothers or sisters, as against more distant cousins: cosina germana is in a document of about 1251 and in Desclot.[3] Jaume I already contrasts Catalan cosí with Aragonese sobrino in the mouth of an Aragonese noble.[3] For the second degree Catalan uses cosí segon and cosí prim, and Roussillon says petits cosins.[3]

In the Middle Ages the word was also used for any relative and figuratively for something very like another: the Catalan Proverbis de Salamó call hope cosina de Déu, and Bernat Metge calls sleep cusí de la mort.[8][9] The DCVB adds the noble youth brought up at a prince's court and a form of address among sailors.[2]

Timeline

  • 1034 – cusina in a will in the cartulary of Sant Cugat.[3][4]
  • 1076 – meo cusino in a Barcelona document.[3]
  • c. 1251 – cosina germana “first cousin” in a document probably from the Alta Ribagorça.[3]
  • 1261 – cosí in the Furs de València, CICA's first record.[10]
  • c. 1274 – Llull uses cosí in the Benedicta tu in mulieribus.[9]
  • 1839 – Labèrnia defines the word as the child of a parent's brother or sister.[11]
  • 1927 – Pal·las distinguishes cosí germà and cosí prim.[12]

Meanings

Noun

  1. cousin: a child of one's uncle or aunt; also cosí germà, first cousin.[13][5]
  2. A child of a parent's cousin; also cosí prim or cosí segon, second cousin.[13]
  3. (dated) A relative in general; something very like another.[2][8]

Word family

  • cosinalla
  • cosinatge

Usage notes

Cosí is also an old literary form of the preterite of cosir “to sew”, a different word.[14]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Alcover, Antoni M.; Moll, Francesc de B. (1930–1962), Diccionari català-valencià-balear, 10 vols., Palma de Mallorca: Moll, p. s.v. cosí
  3. ^ a b c d e f g h i j k l m n o p Coromines, Joan (1980–2001), Diccionari etimològic i complementari de la llengua catalana, 10 vols., Barcelona: Curial / La Caixa (online ed., Institut d'Estudis Catalans 2024), p. 2, 989
  4. ^ a b c Bruguera, Jordi (1996), Diccionari etimològic, Barcelona: Enciclopèdia Catalana, p. 247
  5. ^ a b Enciclopèdia Catalana, Gran diccionari de la llengua catalana (GDLC), Barcelona: Enciclopèdia Catalana; online edition, https://www.diccionari.cat, p. s.v. cosí
  6. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 2165
  7. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. consobrinus
  8. ^ a b Faraudo de Saint-Germain, Lluís, Vocabulari de la llengua catalana medieval, online edition, Barcelona: Institut d'Estudis Catalans, p. s.v. cosí
  9. ^ a b Nou glossari general lul·lià (NGGL), Centre de Documentació Ramon Llull, Universitat de Barcelona, https://nggl.ub.edu, p. s.v. cosí
  10. ^ Torruella, Joan; Pérez Saldanya, Manuel; Martines, Josep (dirs.), Corpus Informatitzat del Català Antic (CICA), https://www.cica.cat, p. s.v. cosí
  11. ^ Labèrnia, Pere (1839–1840), Diccionari de la llengua catalana ab la correspondencia castellana y llatina, 2 vols., Barcelona, p. s.v. cosí
  12. ^ Vallès, Emili (1927), Pal·las: diccionari català il·lustrat, Barcelona: Salvat, p. s.v. cosí
  13. ^ a b Institut d'Estudis Catalans (2007), Diccionari de la llengua catalana, 2nd ed. (DIEC2), Barcelona: Edicions 62; online edition with later updates, https://dlc.iec.cat, p. s.v. cosí
  14. ^ Viccionari (Catalan Wiktionary), https://ca.wiktionary.org, p. s.v. cosí

Related etymologies

Cite this entry

“Cosí.” Etymologically, 13 Nov. 2026, etymologically.com/ca/cos%C3%AD. Accessed 14 Nov. 2026.

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