Okay, I think I understand what you're trying to do. I had the same sort of situation. My father was adopted; so I actually split the projects. However, if you want to show (and/or print) with both names/relations, it's a bit more difficult. I was referring to the CREATE (or ADD) an event option. You could create one called "name change" and go from there. This has to be done in the Normal Editing Mode (not advanced).