Sorry If I have given you any false hope, of any connection with this lady's family.
I have a couple of Robert Watters in my family around the same age group.Out of curiousity, I checked Scotlandspeople site for the birth cert. for Robert Aloysius, but realised he was not part of my family. I was unsure if you were aware of birth details.
There is the usual similarity of names, with the exception of middle names.Your reference to the Jesuit College in Glasgow also made me wonder, if there was a connection, as my uncles, around time of WW1, attended St. Aloysius College in Glasgow, which was, and I believe still is, run by Jesuits.
However, whereas Robert Aloysius family were from Kelvin, in West end of Glasgow. My family were from East End of Glasgow and involved in the steel industry.
Have no confirmation as yet of any emigration to other countries.