Yannik Boisyvon
Boisyvon, Yannick
September 6, 1914 – November 24, 1984 (aged 70)
Birth place: Granville, Manche, France
French writer who collaborated with both his father Lucien Boisyvon and his sister Jacquelin Boisyvon under the collective pseudonym Jean Le Hallier. Name also spelled as Yannick Boysivon.