I adore the name
Leonie, but only if pronounced the French way ("LAY-uh-nee") or the English ("LEE-uh-nee"). A similar name I love is
Leontine ("LAY-un-teen" or "LEE-un-teen"). They are both so rare and delicate sounding, like orchids.
That long, stressed "o" sound that you have listed just kills the name in my ears. Sorry. It's why I've never liked the name
Leona ("lee-O-na").
Leonie Julia strikes me as having a better flow than
Leonie Julianne. How about:
Leonie FleurLeonie CelesteLeonie Jeanne ("zhann")
Leonie Jeanette (
Winston Churchill's mother and aunt in one combination)
Leonie GiseleLeonie AdeleLeonie CharlotteLeonie Josephine
Do you like any of these?