Bob, You might look up Rosaire DuBois in the 1900, 1910, 1920, and 1930 census for MA and/or CT. Once you find the names of his parents you can go to
www.familysearch.org and look up the 1881 census for Canada and hopefully find the parents there. My pepere was Joseph DuBois and was born in Hemmingford PQ in 1870. His family came to western MA to work in the cotton mills. Half his family stayed in MA while the other half returned to the area around St-Jean. I have been lucky searching the family back to France. Found that the original settler from France had the last name of Rondel. Bev