Hi, my great grandmother was Minnie Denault. She was the youngest daughter of Casimir Denault and Marie Pack. It is the same family.
My greatgrandmother went by the name Casamere as well whenever she could, although in her wedding certificate it was corrected to Denault.
I could not find Casamir's death either, but did find a Casimir working in Ontario. I t was difficult in the Pontiac region and possibly he had to go elsewhere for work.