I can see
Raiden or
Wren, maybe. Their kids' names seem trendy to me, but they may not have seemed trendy before Brangelina used them, if YKWIM. :b
Some ideas...
Girls--
LivNiaAcaciaXantheIsisNova (but
Shiloh's mn is Nouvel)
ArtemisCalliopeEris/Aris
YasminAziza
AvivaLuna - someone else suggested this, and I can see them maybe using it
Clio GaiaDenali
CarmelAria/Aurea
Boys--
AyoAsaEzra - they wouldn't use this on a girl, would they? :-/
MagnusCaspianLarkEris/Aris
Zev/Lev
SageJadeMilanTobin/Tobias
SorenJed+ Some more 'x' names for a possible boy:
Lex,
Rex,
Dexter,
Baxter,
Axel
I really have no idea. I was just thumbing through a name book and picking ones that seemed to 'fit'. Watch them go and name it
Brad, Jr. :b