Arabella Jade--fine
Aaliyah Jade--don't like
Mariah Jade--fine; my favorite with the last name
Alivia Jade--all right, but very trendy

Caidyn Codey--too trendy, too unisex
Landen Allen--I love Landen, but not sure about all the alliteration with the last name
Jayden Allen--too trendy, too unisex
Colton Codey--not my style

How about Calvin, Calister, Calison, or any other Cal- name? Then the baby would have dad's initials! Would you like Jena for a girl? Your letters switched a little?

Arabella Jade--Pretty
Aaliyah Jade--don't like
Mariah Jade--Beautiful
Alivia Jade--Too popular

Caidyn Codey--Too many C's
Landen Allen--Lots of L's
Jayden Allen--Really Popular
Colton Codey--Too many C's

Would you be willing to use Jade as a first name instead...you could use Jade Mariah or Jade Elizabeth? Or even put Jade Arabella instead.

For the boy's name I'd use something else.