I am only a guest on Ancestry. In doing research for someone else yesterday I was looking into the Sangster background. The Drouin records led me to believe the following information:
Jane McCotter may have been a married name. There were documents signed by people with the last name "Church" which made me wonder if that was her maiden name.
It appeared to me she was married to a "William McCotter" and had a child with him named John McCotter or McCutter in the records in 1826.
I found a burial for William McCotter in 1827.
In 1828 a Jane McCotter (records show as "James" instead of Jane) married my ancestor bachelor John Sangster (1785-1858) and indicated she was a widow. It then appears she died soon...
A wedding in 1831 indicate John Sangster the widower marrying Helen Stein (records show her as Eleanor Stean on marriage, also as Helaine, and Ellen in Census records) Followed her to living with her daughter Mary(Sangster)Tuckett, and next door to both her son John & other daughter Ellen(Sangster)Cummings/Comming/Cumins.
Your research has me wondering if we are talking about the same Jane McCotter woman, or a generational gap. If you find anything further, please let me know. I don't have any "Ross" information, but would appreciate if you have further information to bridge the gaps in my research.