I like:
Jasper,
Jonas (but not the J-theme)
Julian Peter,
Esther,
Joost (never heard this before, but I kind of like it...)
Sebastian,
CarolineBenjamin,
Marijn (I wonder how this is pronounced)
Koen JulianGuus (if it sounds like
Gus)
Nanna,
BasMarieke,
SanderIngridRenate,
MirandaSimoneMette