For many to most people born after 1850, I have over a dozen different spelling variations that have been used for that person - so a dozen different names.
They have been posted with the "name" in many records besides any that have anything to do with proving a relationship. (Name in a WWI Draft Reg doesn't contribute to proving a relationship - except occasionally if they are the "reference" who will know where they are and "always" will be. Then, that an be used a "Link to bro/wife/mother or whoever is given" - and in the records of BOTH people.
So, in effect, what you describe does not work to document how a person has built his or her case that this person is realated to another in some way, shape, or form.
Citing a source to a name only documents what the name is, not what his or relationship to anyone is.