Okay, I think I may have deciphered not only my John Robinson but also his wife, M.E. also known as (possibly) Mary Elizabeth WILKINS and her PARENTS. Believe it or not it comes from that marriage record I found recently that had my 2nd great-grandfather's sister and brother as witnesses.
Here's where logic comes into play, though it might be only my logic. I recently discovered a Harriet Socket FRANCIS, but I also discovered a Mary Talbot HARDING. Okay, you're thinking 'So what?' I had been going on the assumption that Harriet's MAIDEN name was Socket, but couldn't find any information on anyone with that name, which is when I found the Harriet Socket FRANCIS, daughter of David Francis. So, it stands to reason that if Socket wasn't Harriet's maiden name then TALBOT wasn't Mary Robinson's maiden name. And it turns out that it ISN'T.
The Mary Talbot Robinson in the marriage record who married John Robinson (apologies if it gets confusing) is actually Mary Talbot HARDING. Harding is her MAIDEN name and she's the daughter of Philip Patterson Harding and Esther TALBOT. So if Mary Talbot Harding wife of John Robinson and mother of Mary (Minnie) Talbot Robinson, and Harding is her maiden name, the logical assumption would be that Harriet Wilkins' maiden name is FRANCIS.
If you're confused I apologize, but the simple way to explain it is, the middle names that were listed for the mothers on the marriage record are just that MIDDLE names and not maiden name added instead of middle names. It also bears saying that the witnesses, St. George John WILKINS Robinson and Harriet Annie Mary Robinson would be natural choices because David Francis Henry Wilkins is their uncle, IF my logic is correct. Not only that but look at his name, David Francis; that is Harriet's father's name. Second, Mary Elizabeth Wilkins, daughter of John Wilkins and Harriet Sockett Francis, was christened at the same location as her mother. Third, after another look at the Canadian census records if you look at the religion of both the Wilkins and M.E. Robinson they are the same and her children also share it with the exception of John Robinson. But those too change in the 1861 census as they all have 'Church of England listed'.
I also happened to find a family tree at Ancestry for Mary (Minnie) Talbot Robinson, her parents, grandparents etc. Unfortunately it only had for her mother's side and not much for her father's. I thought if I found something on that John Robinson it would somehow connect back to my OWN John Robinson. But that John was born in Ireland so there can't be any connection except to when his daughter married David Francis Henry Wilkins. The only thing I haven't been able to figure out is WHY David was born in OHIO of all places. The other children of John Wilkins and Harriet Francis were born in England, only David was born in the US. The marriage record claims Charleston, Ohio, which is probably West Virginia, yet his death record from 1892 claims Cleveland. Either way, it seems the Wilkins were in the US between 1845-1850 before they appear in Canada for the 1851 census.
Once again more research is definitely needed but the pieces seem to be falling into place for all the parties except my John Robinson, which is unfortunate. I'm holding off on adding this recent info to my family tree (on my computer anyway) until I find something on him because if any of it turns out to be wrong I'll have to take it out and that is more time consuming on the computer than it is on paper.