I've never liked the sound of
Aurelia.
Lucretia is pronounced loo-CREE-shə in English, so I wouldn't use it if I were you. The Italian form,
Lucrezia, is very beautiful.
I like
Flavia, but it can also be pronounced FLAY-vee-ə in English (e.g.
The Prisoner of Zenda.)
Caius is a good name.
I also like
Antonia,
Augusta,
Caecilia,
Claudia,
Cornelia,
Cornelius,
Herminia,
Julia,
Laurentia,
Livia,
Lucia,
Lucius,
Marina,
Marius,
Martina,
Paulina,
Rufus,
Sabina,
Tatiana, and
Valentina.