This is really good news for me, as I had been following an incorrect lead for some time now. On a marriage certificate of John Sowler (b. 1849) with his first wife Amelia, it listed his parents as George and "Sarah".
Here's the information for the Sowlers in Pelham, Welland, Ontario, in the 1861 Ontario Census:
George Sowler 56 Elizabeth Sowler 54 Hannah Sowler 14 John Sowler 12 David Sowler 9
Source is the Pilot project of FamilySearch (LDS).
My children through my first wife are descendents of John Sowler, through his son Oscar, and then his son William (Bill) Sowler. Bill died about 3-4 years ago. If I can provide any other information, I'd be happy to assist.