Oh, I love your choices! Ivy Cathyann is fabulous, and I also am really fond of Ember - Ember Cathyann sounds great to me too.
Boys names have always been so hard for me. I do really like Amari though (We seriously seriously considered Dhani - which is a little more like Danny than Donny - but it's George Harrison's son's name, and we were just smitten!) -Amari Sayon or Amari Mikal look awesome.
In fact, the more I think of Mikal the more I like it!