Can't offer much on previous 'first ladies,' which is a term I dislike anyway. What in the hell qualifies a woman to be a special representative, just because herpartner has won through to the top of the pile.
Departing from the topic for a moment, the silliness of the situation is exposed here in Australia. Our current Prime Minister is a woman, she has a male partner (they are not married - just live together). He's been dubbed, the "first bloke. " At international conferences he does all the side trips that the first ladies do. My humble opinion (if worth anything) is that he looks bloody silly.
Anyway, I though a thread on this topic may be interesting. But to be really interesting lets go back before the current fad for first ladies.
So I'm going to re-visit history a little. Next post will be about the Empress Wu.