I believe what Hallmark probably found on the Google search about a 'scientist' was a reference to Erwin Schrödinger the Austrian physicist, but he lived at no 26 Kincora Road around the same time.
Hannah - I read your earlier threads and though slow going (!) you have made huge progress.
I can't really add anything since we have no idea of you grandfathers dob and I can't see any marriage to Eva either.
If any use to you, the week after next I will have a bit of time off and one of the things on my agenda is a day at Pearse St Library where they hold the rest of the digitised Electoral Registers - from 1939/40 to 1959/60. I will have a look for Eva, see where she goes and see if any of her children pop up. Also before 1939 you are back to paper searches but can have a check for the relevant addresses and see if we can find some sort of lead. Certainly I can see from newspapers that by 1946 a Mr V F Ross is living at no 27 Kincora so Eva has gone somewhere else.