Congrats on the next baby on the way! How about Bessie, Minnie, Grace, Shirley,Jack(ie), Marjorie, or Nancy? I'm not great with unisex names and I'm, aware that most of these are more on the female side as well.
I'm assuming that you don't want to know the sex of the baby until it comes out then?
She really wants Grace or Gracie but I really don't like it all unfortunately.