1. I like
Iris. It sounds dignified and modest, not too flowery nor too stuckup.
Dahlia is good. I'm not a big fan of the sound of it (like doll, and the fact that it's Dahl -ia, from surname Dahl, is kind of ick). But it's really pretty nice as a name. A little more flowery than
Iris but doesn't lack power.
Eulalie isn't my style... too lilty with only Ls as consonants, not enough oomph. Sounds like you lay lee, right? Nms, awkward IRL IMO
2a.
Iris Paloma, I.
Demetria, I.
Tiffany Dahlia Eve, D.
PilarEulalie Ginevra, E.
Marceline, E.
Desiree
3. What is her brother's name?
I looked at your babynames.com list. Then added my own suggestions
Iris &
Martin;
DominicDahlia &
Jasper;
CedricEulalie &
Solomon,
Julian;
Laurence,
Raoul