I like
Maddox Chivan a lot, it's special, but strikes some chord.
Zahara
Marley is quite nice, not my style, but nice and it fits Zahara perfectly.
Pax Thien is quite perfect, especially for
Pax. I love the combo because it's interesting and beautiful.
Shiloh Nouvel is also a very pretty combo, although I both names are not really common and Nouvel is a real matter of taste. But I like that
Brad Pitt chose Nouvel because of his favourite architect, it's kind of cute. And Nouvel is nice as a middle name.
But these two names,
Knox Leon and
Vivienne Marcheline...
The combo
Vivienne Marcheline is quite nice and Marcheline is interesting because it honors
Jolie's mother (I guess?).
But
Knox Leon is so terrible.
Knox is terrible and
Leon is so very boring, and the names don't go well together AT ALL, imo.
Whatever, if they're happy with it...