Very good, Mary. A couple more observations for you.
Ida Commeau applied for a birth Certificate in 1943, and you will see it in NS Vital Stats. She was living in Mass. I also found a marriage record for her in Jan. 1912 in Chelsea Mass. to a Joseph Gilbrook. Ida says her parents were Joseph and Mary Magdelene Comeau and that her Dad was a seaman at the time of her birth which agrees with the 1881 Census.
Margaret married James O'Keefe Nov. 18, 1906 in Mass.
So you still need to trace Hilarion and Martine. Likely more info in NS Vital Stats on them.