I doubt anyone can answer that for you, until you add a few generations of your mother's ancestors. If you don't know your maternal grandparents, providing more info on your mother's profile, and perhaps relaxing the Privacy setting, would facilitate others helping you.
Edit to add: Unable to resist a challenge, I found your mother's obituary, which led to her parents. They were both born in Canada, and here is their marriage:
"Canada, New Brunswick Provincial Marriages 1789-1950," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVBF-WHR1 : 20 February 2021), George T Clark and Jennie Grant, 17 Nov 1903; citing , , New Brunswick, Canada, p. , Provincial Archives of New Brunswick, Fredericton; FHL microfilm 2,024,709.
If you open the image, then back up one page, it shows all four of your maternal great-grandparents' names.