I was in touch with a few people from Ancestry, and simply asked them if they had ancestors coming from Birmingham (to rule them out as Maggie's relatives, as all my grandfathers relatives are from Birmingham), or North-East Scotland.
I've heard back from one person who replied:
My great grandparents came from Scotland. Their names are James and Elisabeth Cant
I've asked her for more details on what she might know about the Cants, as she doesn't have a tree on Ancestry.