Hi, Have you searched the 1881 Canada Census - the 1891 Canada Census
Should show members of the family - at the same residence at the time
Are you certain of the Birth Year -1880 for Margaret Ann GAUTHIER - in Russell Ontario?
Search of Librrary and Archive Canada - finds a
Francis GAUTHIER - age 38 - born Quebec -
spouse and 7 children ages 12 years - to 5 months
6 born in Quebec - infant born in Ontario.
You have Marriage Information ?
Registration of Death - Long Form Death Certificate may be helpful - though informaton depends on knowledge of the informant