Braun was born in Brussels on 8 September 1876, the son of Senator
Alexandre Braun and Fanny Marcq. He was educated at the
Institut Saint-Louis in Brussels, spending his vacations in the
Ardennes at
Bagimont (now a subdivision of
Vresse-sur-Semois). He took the candidature in law at the
Faculté Saint-Louis in Brussels, spent some time in Bonn, and completed his studies at the
Catholic University of Louvain. Even before graduating, he was publishing verse and prose under a variety of pen names in a wide range of periodicals, including ''L'Avenir du Luxembourg
, L'Avenir social
, La Justice sociale
, Le Luxembourg
, La Belgique
, the Journal de Bruxelles, L'Etudiant
, La Famille
, La Petite revue belge
, Chasse et pêche
, and La Revue vélocipédique belge''. In 1895, he went to Paris to meet
Joris-Karl Huysmans. He was a founding member of ''L'Escholier
and the Société Générale Bruxelloise des Etudiants Catholiques ("Gé"), and a regular contributor to new reviews such as Le Drapeau, Durendal, and Le Spectateur catholique''. From 1898 onwards, he was very active in the legal profession. He co-authored two legal works, one on
trademarks and one on
patents. In 1900, he married Marguerite Van Mons. They lived in Brussels, with a summer home in the Ardennes at
Maissin (now a subdivision of
Paliseul). During the First World War he was an active defence lawyer for Belgians brought before the tribunals established by the
forces of occupation. After his first wife's death in 1919, he married Hélène Moeller (
Henry Moeller's niece and editorial assistant at
Durendal). He was elected to the
Académie royale de langue et de littérature françaises de Belgique in 1939, but was installed only in 1946. He was among the founders of the
Académie Luxembourgeoise. He died in
Ixelles (Brussels) on 11 September 1961. ==Writings==