Yves Le Febvre, (December 24, 1874 - January 21, 1959), was a leftist and anticlerical Breton writer and politician.
In March 1900, he created with Charles Brunellière the Socialist Federation of Brittany, at a congress in Nantes.
A freethinking Socialist, he wrote a number of critical studies of the historical myths created by the nationalistic and often reactionary "Breton movement".
He is now known primarily for his literary works and journalism, such as the Celtic Tales, the Barbarian Trilogy and especially Land of Priests.
An official of Court of Appeal at Amiens after World War I, Yves Le Febvre became president of the Supporters of Morally Abandoned Children of the Somme, becoming very active in the group's role in assisting neglected and criminalised children who were victims of the devastation caused by the war.