Vivienne is so charming! There's nothing wrong with
Vivian, but it looks and feels plainer and less classy than
Vivienne, which is all spark and glamour.
Vivienne looks like the name of an glamerous, golden age era actress;
Vivian looks like your schoolfriend's mum's name.
Aurora is very pretty.
Susannah is lovely and traditionally elegant.
Isabel is okay, but I prefer
Isabelle.
Ada is quite nice too.
From your boys' names, I like
Theodore,
Nicolas (but not
Cole),
Benjamin (but not
Benji),
Jasper,
Isaac and
Charles (and I do like
Charlie as a nn too).