Tough choice... I think I like
Irene better, but only pronounced with three syllables, i-REE-nee, and I assume you're doing the two syllable pronunciation cause the three syllable one sounds awkward with
Edith. Two syllable
Irene and
Esther I like about the same. Hmmm....
Still gonna go with
Irene.
Irene Edith.
http://www.behindthename.com/pnl/87410