I have been able to find no documents to support a Eutichianne Chandonnet being born in 1852 or a marriage to a Joseph St Cyr. Could you forward me the documents you have to support this? Below are links to the documents I have.
1. I have an 1854 baptism record for Marie Eutichianne being born to Adolphe and Henriette. The baptism record was acutally found under the search name of a Marie Autsdden but upon further investigation you can see that its actually Marie Eutichianne Chandonnet as listed in the index in the last pages. I also found a website that lists Wotton baptisms from that time period and it has the Godfather and Godmother listed as Joseph Leduc and Theotiste Nault. http://search.ancestry.com/iexec?htx=view&r=an&dbid=... http://www.originis.ca/bapteme_wotton_1854.html#B232
2. I have a marriage record for Eutichianne and Henri Charland for 1871 that lists Eutichianne as the (grand?)daughter of the late Alexis Chandonnet and Theotiste Nault (I believe her parents are not listed because they died, I cannot find a death record but the 1871 Canadian census had her living with her Grandmother). http://search.ancestry.com/iexec?htx=view&r=an&dbid=... http://search.ancestry.com/iexec?htx=View&r=an&dbid=...
When Henri and Etuchianne took thier 12 kids to the US around 1895 they did live in North Adams, Mass. I have them all listed there in the 1900 census living at 15 Reed St and then sometime around 1907 they moved to Washington St in New Britain, CT.
Please let me know what kind of documentation you have so I can look to see if my information is incorrect.