Hi, Are you certain of the spelling of TERVILLION -Canada - on the St. Lawrence River?
Perhaps posting the name of the relative - There may be persons who will be able to help -perhaps even family connected.
Contact Library & Archives Canadahttp://www.bac-lac.gc.ca/eng/contact-us/Pages/contact-us.asp...
They should be able to answer your question.
Cheers & Good Luck, Stella