#3 needs a name to go with these 2 sisters

Not sure what we’re having but we already have
[name_f]Olivia[/name_f] and [name_f]Emilia[/name_f]
([name_f]Livvie[/name_f]/[name_f]Emi[/name_f])

Short list
boys:
[name_u]Charlie[/name_u]
[name_m]Benjamin[/name_m]

girls:
[name_f]Zara[/name_f]
[name_f]Sienna[/name_f]
[name_f]Annabelle[/name_f]

Any likes/dislikes or suggestions?

I think that both of your girls so far have names ending in -ia and starting in vowel, so if you have another girl it would be nice to keep the third that way so as one doesn’t get too isolated from her sisters’ names.
[name_f]Amelia[/name_f]/[name_f]Amalia[/name_f]
[name_f]Alicia[/name_f]
[name_f]Alexia[/name_f]
[name_f]Anastasia[/name_f]
[name_f]India[/name_f]

Among yours, I think [name_f]Annabelle[/name_f] doesn’t fit. [name_u]Charlie[/name_u], I’m not sure. [name_u]Love[/name_u] [name_m]Benjamin[/name_m]!

[name_m]Alejo[/name_m]
[name_m]Adrian[/name_m]
[name_m]Lorenzo[/name_m]
[name_m]Santiago[/name_m]
[name_m]Ulises[/name_m]

When it comes to girl names I feel that it would match as long as it ends in ‘a’. [name_f]May[/name_f] I suggest:
[name_f]Julia[/name_f]
[name_f]Georgianna[/name_f]
[name_f]Ava[/name_f]
[name_f]Isabella[/name_f]
[name_f]Victoria[/name_f]
[name_f]Helena[/name_f]
[name_f]Greta[/name_f]
[name_f]Anna[/name_f]
[name_f]Theresa[/name_f]
[name_f]Rhea[/name_f]

A few ideas:
[name_f]Agatha[/name_f]
[name_f]Bridget[/name_f]
[name_f]Lucy[/name_f]/[name_f]Lucille[/name_f]
[name_f]Carys[/name_f]
[name_f]Alice[/name_f]
[name_f]Iona[/name_f]
[name_f]Tamsin[/name_f]
[name_f]Jade[/name_f]
[name_f]Zara[/name_f]
[name_f]Cleo[/name_f]
[name_f]Saskia[/name_f]
[name_f]Rachel[/name_f]
[name_f]Nuala[/name_f]
[name_f]Helena[/name_f]
[name_f]Clarice[/name_f]
[name_f]Esme[/name_f]
[name_f]Celeste[/name_f]
[name_f]Paloma[/name_f]
[name_f]Marianne[/name_f]

[name_m]Asa[/name_m]
[name_m]Raoul[/name_m]
[name_m]Sebastian[/name_m]
[name_m]Lucas[/name_m]
[name_m]Alexander[/name_m]
[name_m]Gabriel[/name_m]
[name_m]Kai[/name_m]
[name_m]Laurence[/name_m]
[name_m]Miles[/name_m]
[name_m]Fionn[/name_m]

I think [name_f]Olivia[/name_f], [name_f]Emilia[/name_f] and [name_f]Sienna[/name_f] would be nice.
Other Italian names ending in -ia you might like are:

vittoria
gloria
lavinia
nadia
ottavia
gioia
lucia
[name_f]SOFIA[/name_f]/[name_f]SOPHIA[/name_f] (this one would go so nicely with sisters)
virginia
lucrezia

other italian names not ending in -ia that would fit with sisters:
stella
isabella
ginevra

for a boy benjamin would be nice. otherwise:
leo
[name_m]LUCIAN[/name_m]
[name_m]ADRIAN[/name_m]
ivan

I do like sticking with the “ia” ending, but here are some suggestions, some with that ending, some without.

[name_f]Acacia[/name_f]
[name_f]Antonia[/name_f]
[name_f]Aviana[/name_f]
[name_f]Beata[/name_f]
[name_f]Camilla[/name_f]
[name_f]Celia[/name_f]
[name_f]Cecilia[/name_f]
[name_f]Lucia[/name_f]
[name_f]Louisa[/name_f]
[name_f]Viola[/name_f]

[name_m]Damian[/name_m]
[name_m]Arthur[/name_m]
[name_m]Henry[/name_m]
[name_m]Samuel[/name_m]
[name_m]Vincent[/name_m]

I am not a fan of nicknames on the birth certificate, so prefer [name_m]Charles[/name_m] with [name_u]Charlie[/name_u] as the nickname. [name_m]Benjamin[/name_m] is great.

None of the girls names are a match for your other two in my opinion.

I like [name_f]Sienna[/name_f] from your choices. It would be very pretty with [name_f]Olivia[/name_f] and [name_f]Emilia[/name_f].
For boys, I like [name_m]Benjamin[/name_m]. Great choice!

Other suggestions:
[name_f]Aria[/name_f]
[name_f]Aurelia[/name_f]
[name_f]Cecilia[/name_f]/[name_f]Celia[/name_f]
[name_f]Georgia[/name_f]
[name_f]Lydia[/name_f]

[name_m]Alexander[/name_m]
[name_m]Andrew[/name_m]
[name_m]Gabriel[/name_m]
[name_m]Nathaniel[/name_m]

[name_f]Annabelle[/name_f] and [name_u]Charlie[/name_u]!!

[name_f]Olivia[/name_f], [name_f]Emilia[/name_f] and [name_m]Benjamin[/name_m]
[name_f]Olivia[/name_f], [name_f]Emilia[/name_f] and [name_f]Sienna[/name_f]

I also like [name_f]Zara[/name_f].

[name_f]Olivia[/name_f], [name_f]Emilia[/name_f] and [name_m]Benjamin[/name_m] “[name_m]Benji[/name_m]”
[name_f]Olivia[/name_f], [name_f]Emilia[/name_f] and [name_f]Sienna[/name_f]

I also like [name_f]Zara[/name_f].

With [name_f]Olivia[/name_f] ([name_f]Livie[/name_f]) and [name_f]Emilia[/name_f] ([name_f]Emi[/name_f]), [name_m]Benjamin[/name_m] ([name_m]Ben[/name_m] or [name_m]Benji[/name_m]) would be the perfect fit if it was a boy.
For a girl, I think [name_f]Zara[/name_f] would stand out too much, tho I really like it. I think [name_f]Sienna[/name_f] or [name_f]Annabelle[/name_f] ([name_f]Annie[/name_f] or [name_f]Belle[/name_f]) would fit better. Personally I prefer [name_f]Sienna[/name_f] over [name_f]Annabelle[/name_f], but I think [name_f]Annabelle[/name_f] would match better with [name_f]Olivia[/name_f] and [name_f]Emilia[/name_f].

Alaynia(a-lay-nee-a),Aliceia(a-lee-see-a),Uraynia(u-ray-nee-a)

Out of your lists I love

[name_m]Benjamin[/name_m] for a boy and [name_f]Zara[/name_f]/[name_f]Sienna[/name_f] for a girl.

Great choices!