I have an obituary (one of several) of John McConnochie (an engineer) that gives the above facts but doesn't give the name of his father.
It is likely that his father was Robert McConnochie, my great great great grandfather.
John McConnochie was Engineer to the Marquis of Bute and designed and built the Cardiff South Dock. He became Mayor of Cardiff.
He was a relation of my grandmother's and obituaries of him are among the papers of my father's family. My brothers were shown his very fine house in Park Place, Cardiff by my uncle when he was alive.
We think that he was probably a great uncle of my grand mother's.
Unfortunately none of my father's generation of the family, who would have been able to shed some light on this, is alive.
If his father was Robert, the father of my great great grandfather, Charles, who was born in Edinburgh in 1933 (the family moved around a bit) we would be getting somewhere.
Many thanks for your message.