That is insane, seem iv still much to learn. How do you even verify with no baptism.
Scottish death certificates normally give the names of both parents, including the mother's maiden surname, and the name(s) of any spouse(s). They are not always correct, but mostly they are.
Only issue iv found so far beside this is siblings liked to give their kids the same names which gets confusing
Ah, but that can be useful. A lot of parents followed the traditional naming pattern, which was
First daughter after mother's mother
First son after father's father
Second daughter after father's mother
Second son after mother's father
Third daughter after mother
Third son after father
Fourth and subsequent children after geat-grandparents, uncles/aunts, minister, doctor, schoolmaster, landowner etc or their wives.
So if, for example, the names of Elizabeth's first daughter and second son are the same as those of Susan's first daughter and second son, you have a pointer to the names of their parents.
I note that John and Susan named their first and second daughters Jean, the first one having presumably died as she isn't in the census with the rest of the family, and the next daughter Janet. James and Elizabeth's first daughter was Jean and her second was Janet.