I like
Emily and
Audrey.
Evan and
Kyle is a decent sibset as well. I've never been that wild about the name
Kyle because I've met so many and it seems boring to me as a result, but I think it's a respectable name.
Marvin and Darvin are way too close. They could have at least named Darvin
Darwin, but even then, the names still would have been overly similar.
Out of the others, I like:
Mary Rachel
Brooke Xavier Camille Gia
I had heard of
China as a first name, but not Japan. It seems really odd as a first name to me.