Hi MC,
Don't know if this helps with your specific enquiry but, I was of the understanding that names included in brackets that were not followed by the word "and" generally referred to either parent's or spouse's names. As this differentiated between individuals with same first and last names.
Also, in some instances the occupation or family trade, the name of the family dwelling, skills associated with the individual, religious affiliation, or physical or moral characteristics of the individual or that person's ancestors.
Cheers,
Janet.