Hi Karen

I knew you'd come up trumps!
Your 1901 Minnie in Ancaster is down as born May 1878 - which is the same month as the 1911 one. The 1911 is such a poor image that 1875 and 1878 might be confused
Sadly, the Gwennap Minnie is still with her mother in Cornwall on the 1891, when Sean's grt grandmother was supposedly in Canada.
I've found a Mary J Bray, aged 4, b. Victoria, Australia, in Gwennap living with with grandmother and parents Tom and Nancy (RG11/2329/39/22) but with her mother in Gwennap in 1891.
Also a Mary E Bray , aged 2, b. Falmouth, in Falmouth living with parents John H and Sarah A (RG11/2316/88/46). This one not easliy identifiable in 1891.
There are also a few other Mary (E) Bray born around the approx. time in other English counties but none that are a good match in Wales
I'm having problems getting your Manitoba marriage info to load. I'm assuming it didn't give parents details

JL