Mary Ann died 1 June 1956, Vancouver, BC, father's name transcribed as "Robert Coula"
https://www.familysearch.org/ark:/61903/1:1:FLRJ-9SHWhich means she is probably this person:
In 1911, there is a Mary Ann Coull, 26, born June 1884 in Scotland, arrived 1910, working as a maid for a Paterson/Peterson family in St Antoine, Montreal. Also in the household is a Joan Coull [indexed as John at ancestry], age 24, born June 1886, Scotland, arrived 1911.
If so, she is the daughter of Robert and Agnes Coull, living in Throston, Durham, England, in 1901. Age 15, sister Joan, age 13, in the same household. Also a Robert Coull, age 9
Robert might be the R Coull on the burial register.
and if so, Robert, when entering the US
said his father Robert was at 82 Bennett Avenue, Maisonneuve, PQ.
Robert, 28 and wife Betsey, 20, were headed to Fall River, Massachusetts. Lots on Robert in the US.