Jules Gilliéron

Jules Gilliéron (21 December 1854 – 26 April 1926) was a Swiss-French linguist and dialectologist. Born and initially educated in Switzerland, he studied linguistics at the École pratique des Hautes Études in Paris, where he spent the remainder of his life. His mentors included Michel Bréal and Gaston Paris, who supported his academic career; Bréal helped him secure a lectureship at the École pratique in 1883. He became a French citizen in 1886, a professor in 1894, and assistant director of the École pratique by 1913, the same year he was awarded the Légion d'honneur.

Gilliéron's early publications in the field of linguistic geography included an 1880 study of the dialect of the Swiss town of Vionnaz and the Petit Atlas phonétique de Valais roman ('Little Phonetic Atlas of Roman Valais'). In the latter, he developed the methods he would later apply to larger projects, such as the use of a pre-prepared questionnaire. He co-founded an academic journal, the Revue des patois gallo-romans ('Journal of Gallo-Romance Dialects'), with Jean-Pierre Rousselot in 1887. He used a novel phonetic transcription system, developed with Rousselot, for the Atlas Linguistique de la France ('Linguistic Atlas of France'; ALF), a complete linguistic atlas of the Gallo-Romance area. The ALF, which he produced in collaboration with a fieldworker, Edmond Edmont, was the first major linguistic atlas of a Romance language, and its methodology influenced subsequent works of linguistic geography. Karl Jaberg and Jakob Jud, two of Gilliéron's students, later applied his methods to Italy and southern Switzerland.

Gilliéron considered the proper object of etymology to be the whole history of words, rather than only their origins. He opposed the Neogrammarian view that language evolves through exceptionless laws of sound change, arguing that linguistic changes are not always uniform and are influenced by human psychology. He believed that speakers could only differentiate concepts for which they had discrete linguistic forms, and therefore viewed phenomena such as folk etymology as potentially "pathological" forces which could reduce the complexity and thus the usefulness of a language, and which require speakers to use "therapies" to counteract them.

Gilliéron has been called "the master of linguistic geography", and credited as the founder of scientific dialectology in France. His student body was highly international, and many of those who attended his lectures went on to be prominent in linguistics and related fields in countries throughout Europe.