+--Pierre Louis Bergevin-Langevin  (7 Jun 1753-25 Jul 1836)
      +--Pierre Bergevin-Langevin  (1 Nov 1785-23 Sep 1863)
      |  |  +--Francois Hebert  (1719-)
      |  +--Agathe Marie Hebert  (1758-Oct 1835)
      |     +--Marie Arsenault 
   +--Sylvain Langevin  (8 Oct 1835-6 Jun 1923)
   |  |  +--Albert Mercier 
   |  +--Angelique Mercier  (ABT 1789-AFT 1861)
   |     +--Madeleine Sauve 
+--Oscar Langevin  (1864-)
|  |  +--Antoine Moineau 
|  +--Odille Moineau-Moquin  (1830/1833/1837-1883)
|     +--Angelique Legros 
Nathaniel Langevin 
|  +--Pierre Leduc 
+--Sophronie Leduc 
   +--Henriette Brunet