I have: Madeleine Frigon (Joseph and Magdeleine LeFebvre) b. b. 14 Aug 1784 St. Genevieve de Batiscan m. Jean Levreau DE LANGIS m 11 May 1807 Champlain.
Just a note, that when I searched PRDH for JEan LEVREAU DENANGISthat there was one marriage for a Jean Baptiste m 014 Feb 1756 in Vercheres (to Madeleine DAILBOUT DEMANTHET d 1782 age 80), who was a soldier attached to the navy. He is listed as being from Ville Marie (Montreal) but is a native of Batiscan.If that is Batiscan, Quebec, that is where the Frigon's lived, so this may well be your line.
Also, many of these records for LEVREAU DENANGIS are listed under LEVREAU, so you might want to check that out as there are other Jean LeVreau's listed. There are several in Batiscan, Quebec.
I see there are also alternate spellings: DELANGY
Georges Frigon may be able to help you more with this as well.