Meven Mordiern

Meven Mordiern, the pen name of René Le Roux (29 October 1878 – 4 February 1949), was a Breton writer of French origin, and a specialist on the ancient Celtic culture.

He was the main collaborator of the lexicographer François Vallée, who created the most complete dictionary of the Breton language in the first part of the 20th century.

From 1891 to 1897 he continued his studies at the Lycée Condorcet in Paris, where he lived until 1920, apart from a stay in London to learn English from July 1898 to June 1899.

He devoted his entire life to studying Celtic civilizations, alongside research focused on the natural sciences and the humanities.

In permanent collaboration with the grammarian and lexicographer François Vallée, he was the author of a considerable work on the ancient Celts, Notennou diwar-benn ar Gelted koz, published in 12 parts between 1911 and 1922, and of a History of the World (Istor ar Bed) and other essays published by the journal Gwalarn.