So I'm not really seeing it as a name. :-/ It's too bad - the meaning is lovely and it has a great history.
Of yours, I like:
Concordia Blythe - very cool
Concordia Hélène (ay-LEN) - I really like this one.
Concordia IrisConcordia JaneConcordia JuneConcordia LilianConcordia LucyConcordia MargaretConcordia MathildeConcordia MayConcordia SylvieConcordia Vivian
I think I like might steal
Concordia Blythe for a GP. ;-)