I definitely prefer
Emilia. I think it has a softer, more feminine feel to it than
Amelia that sounds harsh (the Ah-part in Ah-melia sounds like someone shouting) to me. I really like
Emilia Jane, although
Jane is nmsaa and
Emilia Josephine (prefer Joséphine) but I'm not thinking "WOW, that's a great combo!".
Some suggestions:
Emilia VienneEmilia GenevieveEmilia MarieEmilia EmeraldEmilia SalomeEmilia SandrineEmilia HarrietEmilia AdelaideEmilia IsabelEmilia Aisling
Oh, and I think
Millie is a great nn although I prefer
Emilia without any nn.