Suggestions of names beyond [name]Olivia[/name] and [name]Amelia[/name] that end in -ia…
[name]Rosalia[/name], [name]Pia[/name], [name]Victoria[/name], [name]Anastasia[/name], [name]Sonia[/name] - off the top of my head 
[name]Julia[/name]
[name]Lia[/name]
[name]Sophia[/name]
[name]Delia[/name]
[name]Lydia[/name]
[name]Sylvia[/name]
[name]Mia[/name]
[name]Daria[/name]
[name]Virginia[/name]
[name]Georgia[/name]
[name]Nadia[/name]
[name]Thalia[/name]
[name]Lucia[/name]
[name]Felicia[/name]
[name]Aurelia[/name]
[name]Lavinia[/name]
[name]Laetitia[/name]
[name]Alessia[/name]
[name]Alexia[/name]
[name]Claudia[/name]
[name]Cynthia[/name]
[name]Dahlia[/name]
[name]Lucretia[/name]
[name]Natalia[/name]
[name]Odelia[/name]
[name]Octavia[/name]
[name]Ophelia[/name]
[name]Saskia[/name]
[name]Junia[/name]
[name]Gia[/name]
[name]Thea[/name]
[name]Bedelia[/name]
[name]Cornelia[/name]
Euginia
[name]Cordelia[/name]
[name]Saskia[/name]
[name]Malia[/name]
[name]Natalia[/name]
[name]Gloria[/name]
[name]Tia[/name]
[name]Maria[/name]
[name]Milania[/name]
[name]Gracia[/name]
[name]Lucia[/name]
[name]Ophelia[/name]
[name]Sylvia[/name]
[name]Kaia[/name]
[name]Sophia[/name]
[name]Georgia[/name]
[name]Lydia[/name]
[name]Nadia[/name]
[name]Victoria[/name]
[name]Virginia[/name]
[name]Mia[/name]
[name]Tia[/name]
[name]Cecilia[/name]
[name]Acacia[/name]
[name]Arcadia[/name]
[name]Portia[/name]
[name]Delia[/name]
Sorted roughly by length:
[name]Katia[/name], [name]Dahlia[/name], [name]Talia[/name], [name]Delia[/name], Tzvia.
[name]Camellia[/name], [name]Magnolia[/name], [name]Cordelia[/name], [name]Laetitia[/name], [name]Ketzia[/name]/[name]Kezia[/name], [name]Zakia[/name], [name]Felicia[/name].
[name]Ottavia[/name], [name]Victoria[/name], [name]Alexandria[/name].
[name]Antonia[/name]
[name]Alessia[/name]
[name]Anastasia[/name]
[name]Lydia[/name]
[name]Emilia[/name]
[name]Cecilia[/name]
[name]Lucia[/name]
[name]Julia[/name]
[name]Cordelia[/name]
[name]Livia[/name]
[name]Aurelia[/name]
[name]Octavia[/name]
[name]Portia[/name]
[name]Delia[/name]
[name]Georgia[/name]
[name]Celia[/name]
[name]Lavinia[/name]
[name]Magnolia[/name]
[name]Victoria[/name]
[name]Patricia[/name]
[name]Sophia[/name]/[name]Sofia[/name]
My favorites are:
[name]Cordelia[/name]
[name]Victoria[/name]
[name]Lydia[/name]
[name]Katia[/name]
[name]Cynthia[/name] (my own name)
Letticia
[name]Lavinia[/name]
[name]Gia[/name]
[name]Fia[/name]
[name]Florencia[/name]
[name]Gloria[/name]
[name]Rosalia[/name]
[name]Coralia[/name]
[name]Adelia[/name]
[name]Adalia[/name]
[name]Celia[/name]
[name]Zelia[/name]
[name]Zia[/name]
[name]Tia[/name]
Sorry for any repeats, but these are some of my favourites:
[name]Aloisia[/name]
[name]Antonia[/name]
[name]Apolonia[/name]/ Apol·lònia
[name]Eulalia[/name]/ Eulàlia
[name]Evgenia[/name]
[name]Hortensia[/name]
[name]Junia[/name]
[name]Nuria[/name]
[name]Olimpia[/name]
[name]Titania[/name]
[name]Virginia[/name]