Ooh, I love all the double a endings. Sounds very Italian. 
[name]Alessandra[/name] [name]Luna[/name] is very decadent and flowy and feminine. I really like it.
[name]Ava[/name] [name]Valentina[/name] has a similar feel, but I don’t like [name]Ava[/name]'s popularity and the V’s are too close together for me to say the combo gracefully. Maybe my tongue is just broken though. 
[name]Lila[/name] [name]Francesca[/name] is, again, so smooth and flowy and, well, kind of sexy. All of these are actually. In a good way. yum.
[name]Thalia[/name] is [name]TAL[/name] yuh? I don’t like it as much as [name]Alessandra[/name], [name]Luna[/name], [name]Valentina[/name], [name]Lila[/name], [name]Francesca[/name] or [name]Juliet[/name]. I’d rather see any of those, Fracesca [name]Juliet[/name], [name]Ava[/name] [name]Juliet[/name], etc.
[name]Dante[/name] [name]Samuel[/name] - I’m not the hugest [name]Dante[/name] fan, and it comes across almost stereotypical. The combo is just fine, if not very exciting to me personally.
[name]Roman[/name] [name]Antonio[/name] - this combo is enough to almost make me like [name]Roman[/name] and [name]Antonio[/name]. Almost.
I really like this pairing, though neither names are ones I’d choose.
[name]Nico[/name] [name]Grey[/name]- I’m loving [name]Nico[/name], but not [name]Grey[/name]. [name]Grey[/name] can be kind of handsome in the middle, with the right first name. [name]Nico[/name] is to spunky and fun to be that name. I’d like [name]Dominic[/name] [name]Grey[/name] myself, and [name]Nico[/name] [name]Roman[/name], [name]Nico[/name] [name]Alexander[/name], [name]Nico[/name] – something else.
[name]Marcus[/name] [name]Leo[/name] - it’s fine. A bit meh compared some others of yours. Your girl names are all drool worthy but your boys leave me looking for a bit more, [name]Leonardo[/name] not an option? I know a 6 year old Italian boy named [name]Leonardo[/name], called [name]Leo[/name], and it’s wonderful. [name]Leonardo[/name] [name]Grey[/name]? [name]Even[/name] [name]Marcus[/name] [name]Leonardo[/name] is pretty cool too.