I was going to suggest
Azalea Helena, prn heh-LAY-nah; sort of splits the difference between
Elena and
Helen. I think of
Elena and
Helena as being interchangeable, frankly; I use
Helena when I want to use one as a mn after a fn ending in A. Makes it easier to say, imo. I think it (either
Elena or
Helena) sounds particularly nice in this combo, with the two long As.
:-)