Guillaume Bertou, who signed his works G.B. Kerverzhioù ('Kervezhiou' before 1941) was a Breton writer born in Paimpol on 10th May 1908 and died in Rennes on 13th March 1951. He was secretary of 'Gwalarn' and also manager of the newspaper 'Arvor'. He wrote the column 'ar yezh hag ar vro' in 'L'Heure Bretonne'. After the war he was the treasurer of 'Kad' and editor of 'Ogarm'. He also wrote in Galv, Studi hag ober and Al Liamm.