The 'Edey' line has been traced through the 'American' pioneers of 1805 to Aylmer PQ from Randolph Vt. And from there back to a vicar in Cranbrook/Kent in 1559.
A photo of your grandparents's grave marker at St.John's Anglican cemetery on Sandhill Rd is available on-line.
My records imply your grandfather married Orpha Mabel Boyce [1924-1997] on the same date he married Olga. Since I show Olga died in 1949, I suspect the real story is something different. Perhaps your [war-bride?]Mother is the only issue of the marriage to Olga and your siblings are from the second marriage?