Eleanore was indeed the daughter of Francois-Xavier Ducharme and Elisabeth Miville-Deschenes, that were married on Sept 29, 1863 in Ste-Elisabeth, QC. As far as I can see, she was the oldest of 11 children, being born on Sept 23, 1864 in Lafontaine, ON. The 9 older children were in fact born in Lafontaine, and the 2 younger in Red Lake Falls, MN, where Xavier migrated around 1878.
Hence, the death certificates were correct in stating that Eleanore's mother was Elisabeth Deschenes.
It's possible that Desire Robillard's wife was also named Elisabeth Miville-Deschenes, but this informations may also be a mistake. This I can't say and it should be checked on the Robillard Forum. Certainly, «Menonm» is a mistake, and Michel is likely to be the correct name.
Now can you tell me when and where Eleonore and Aristide were married? Also, do you have information on her brothers and sisters?