Junius (m) - eh, it sounds pretentious.
Livy (m) - no, unfortunately it sounds like a girls name.
Livia (f) - nice, but it looks incomplete. It's similarity to
Olivia makes it useable
Antonius (m) - sounds very pretentious, I prefer
Anthony.
Claudius (m) - ok, but again, I prefer the simple
Claude.
Porcia (f) - I like
Portia a lot.
Pompeia (f) - reminds me of Pompeii, not too great, even though the story is fascinating.
Cassius (m) - I think it's useable. It reminds me of
Cassius Clay, who as we all know, changed his name.
Octavia (f) - I like it, really regal and interesting. I also like the softer
Ottavia.
Sextus (m) - not a good idea! I know the teasing would be immature, but even still.
Tiberius (m) - reminds me of the bone, lol.
Seneca (m) - love it. I've loved the name ever since doing the play Trojan Women (very depressing story), it has a nice sound.
Britannicus (m) - like, the male
Brittany? That's what it looks like to most people.
Quintus (m) - I like it, but prefer
Quinn or
Quentin.
Aulus (m) - hard to say.
Attis (m) - kind of awkward, it has no definite sounds in it.