I like
Romola much better than
Romilda, just because it doesn't have that "mild" sound that is so close to "mildew". Of your combos, I like:
Romola CatherineRomola CecilyRomola CharlotteRomola EveRomola IrisRomola JosephineRomola JuneRomola VioletRomola Vivian