As far as I know
Noa is unisex, but in the Netherlands
Noa is more often used for girls and
Noah for boys.
A few people in the Netherlands call there babyboy
Emma or
Emily, but I feel sorry for those boys...
If you follow this link you can see it:
Emma:
http://www.babyinfo.nl/fun/namen/namenteller.asp?naam=Emma&selFrom=1990&selTo=2005&Geslacht=BEmily:
http://www.babyinfo.nl/fun/namen/namenteller.asp?naam=Emily&selFrom=1990&selTo=2005&Geslacht=B