Godin, Toussaint dit Bellefontaine, 1769in Ekoupahag (French Vill), Nova Scotia (later NB), Died BEF 1851 in Kingsclear, York County, New Brunswick
This would tie in so beautifully with the Madeline in the household in 1852...however I have looked and looked and can't find anything that connects to your man...unless he was using a nickname or middle name... This site show the father of that Toussant, and goes way back to early Montreal then Nova Scotia
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=katheriot&id=I12581and then here goes back to ***GODIN dit CHATILLON dit BELLEFONTAINE and even to France
http://www.acadian-roots.com/genealogy-godin.htmlwhich all makes for interesting reading, and certainly could be that he is a descendant of one of them
( French Village is in Kingsclear, but also in Nova Scotia)
This is the FHS site that follows down the line ( a submission) but if you look at Toussant's link he is married to Madeline Tardiff, as you said, but none of the children match the name Asaiah. ( the unnamed child must have also been found as a death)
https://familysearch.org/pal:/MM9.2.1/SG26-WL7While I do believe Toussant fathered children until his seventies, I don't believe the mother could have, so having her age the same as his on the one site was likely contrived ...The Madeline on the census would have been around 50 when Isaih was born, not impossible, but certainly rare...although, again, people pulled ages out of a hat at census time, it seems...
*** dit is hard to explain, so will just send you here
http://www.francogene.com/quebec/ditnames.php