Hi, Have you contacted the Cemetery Office ?
They will have records of all deaths/burials - at the Cemetery - whether there is a headstone or not.
Many cemetery transcriptions found online - may be from headstones - found at the cemetery - and not from cemetery records.
Cemetery Office - will also know the name of the Funeral Home / Undertaker in charge of arrangements - Cemetery Office - / Funeral Home - may know if an OBITUARY had been published.
REGISTRATION of DEATH: From Govt of Ontario Vital Statistics Registry.
There is a fee.
From Ontario Cemetery Finding Aid - online
BROWN, Charles W. Palmerston, Section E Wellington Minto WE-4341
If the county name is "Wellington" please contact...
Wellington County Branch, OGS
P.O. Box 1211
Guelph, ON N1H 6N6