Loanword from Gaulish; cf. Bret. couann, Welsh cuan. Also Fr. chevèche f. 'little owl, Athena noctua' seems to be connected with the root of Lat. cavannus (Fr. chat-huant), perhaps with suff. -ecca (TLF). And west Fr. dial. chouan 'owl', cf. Bret. couann, prob. altered by influence of Fr. chouette < OFr. choan (TLF).
Trésors de la langue francaise informatisées. Centre national de ressources techniques et lexiques. http://www.cnrtl.fr/definition/
Robert Farren, PIE culture words collection, 2017
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