Hi Catherine...depending on where in Ontario....I might be able to help. I have David Calvert b.1848 who married Mary Jane Quinn b.1850 and resided in Lakeside Ontario. They had the following children that lived and married.
Jane Annie who Married Walter Armstrong Daniel who married a Hazel - resided in BC William who married Laura - resided in Saskatchewan.
David also had a brother John b.1852who married Mary Jane Nesbitt b.1853. John and Mary Jane lived in Oxford Co. E. Nissori Township near a little hamlet called Banner. This is my Great Great Grandfather. I'm just starting my research and don't know of any other of his offspring other then my Great Grandfather David William b. 1873. There where two siblings, Joseph and Judith Jane (Jennie) that didn't marry. Of the other children I know nothing more about either Gilbert b.1882, Nesbitt b.1888(very difficult name to read on the 1901 census...starts with an "N" though), or John Austin b.1883 who married a Francis.
My great great parents Mary Jane and John are buried in Dorchester Union Cemetary, and my great great aunt and uncle Mary Jane and David are buried in Christ Church Anglican in Lakeside with 5 of their children who died as children.
I know there was a third brother of John and David who went to the states, possibly Chicago. John, David and bro. they came from Co. Down, N. Ireland in 1875 & 1865 (respectively).
If any of these people sound familiar please contact me at email@example.com