In order to figure out how best to massage my data to fit into WikiTree's insanely ill-suited name fields, I'd like to know the basic _intent_ behind the fields and their labeling.
Take for example "last name at birth". As the first step, I'm going to make the assumption that "last name" is meant as "surname", not the actual positional role it indicates. (Very Bad Choice of labeling.)
So what does "at birth" mean? My grandmother and her elder brother (and a stillborn sister before them) were born years before their parents married, but by law they were legitimate -- retroactively. This means that technically, their surname for the first years of their lives was legally their mother's, but they were never identified with it, and all later documents (and oral traditions) use their father's surname. (If there had been such a thing as kindergarten, I'm sure my great-uncle would've been registered for it with his father's surname.) Their birth register entries have annotations referring to the retroactive name change, but because register changes/corrections were recorded in separate books, the actual name is not on the register page.
So what is my grandmother's "last name at birth"? Should I be snide and just put in "Gizella", a name that was never used to identify her, but is the actually positionally-last item on her birth register entry? I'm probably going to just put in her father's surname, because that's what her surname was, and the legitimacy complications are really just an anecdote for her bio, but I'd like to know how that conflicts or meshes with the background intentions involved.