Léon Maxime Joseph Decaillon
- Born on June 4, 1871 in Neuville-sur-Escaut
Parents
- Louis Joseph Decaillon (1843 - 1918)
- Florimonde Zoé Caudmont (1852 - )
Family
- Married on July 31, 1897 in Neuville-sur-Escaut, with Louise Mathilde Morville (1875 - 1910), issuing
- Robert Louis Julien (1898 - 1898)
- Robert Louis Julien (1899 - )
- Married on December 11, 1920, with Angèle Mathilde Decaillon (1874 - )