I think I may have the answer to my original post. Betty's mother had the maiden name of Cruickshank. I have found a marriage record in Scotlands people with a Elizabeth (Betty?) Cruickshank to a Alexander John Duncan (known as George?) in 1949 Springbank. No image available.
Her mother remarried in 1942 recorded as Cruickshank or Johnston..to..coincidently a Duncan james.
He was 67 she was 48! I have the printed image of this record. Thank You David