I do think [name_f]Zalia[/name_f] would be a little matchy with Aerlia. I like [name_f]Amelie[/name_f] and don’t think it’s too close since [name_f]Amelie[/name_f] and Aerlia sound so different. Other suggestions:
I love [name_f]Valentina[/name_f]. A little softer but to me has a similar feel is [name_f]Sonata[/name_f], which is also less popular. Might be a little out there for you.
I personally love [name_f]Amelie[/name_f] a whole lot, but I do feel like it is a little too close to Aerlia (beautiful name, by the way!). My next pick out of yours is [name_f]Valentina[/name_f]. Some other names I like are:
[name_f]Xaviera[/name_f] (maybe a bit too close with thte “uh” ending?)
[name_u]Luca[/name_u] (traditionally a male name but is easily feminine, and almost similar to your pick [name_f]Lucia[/name_f].)
[name_f]Lilith[/name_f] (my favorite, but the meaning might make you dislike it.)
[name_f]Margaux[/name_f] / [name_f]Margot[/name_f] (lovely name and either spelling works, but either could also cause confusion with pronunciation.)
[name_u]Finley[/name_u] (you have the nickname [name_u]Finn[/name_u], but seems to be used more on the masculine side.)
Thank you all for your beautiful suggestions! I quite like [name_f]Sunniva[/name_f], [name_f]Sonata[/name_f] and [name_f]Margot[/name_f]. I will run them past my husband.
We have also struck upon [name_f]Saskia[/name_f] since my original post. It still has the ia ending that we seem to gravitate to but not “lia” so not as matchy with Aerlia as [name_f]Zalia[/name_f] might be. What do you think? We like the Sus - ki - ah pronunciation.
[name_f]Sonata[/name_f] with Aerlia still looks so sweet and unique as a sibset though, for me its between those two, either [name_f]Sonata[/name_f] or [name_f]Saskia[/name_f] with Aerlia
[name_f]Saskia[/name_f] is a beautiful name and would fit with Aerlia much better than [name_f]Zalia[/name_f] in my opinion.
[name_f]Valentina[/name_f] and Aerlia stand out the most for me from your original three. It has great nn options so it doesn’t have to be a big name to carry. Also, I always thought of [name_u]Valentine[/name_u]'s as being shy. Usually [name_u]Valentine[/name_u]'s cards are from secret admirers. I think of it as a soft and sweet name more than flashy and loud. If that helps you.
[name_f]Amelie[/name_f] is too close to me. [name_f]Emilie[/name_f] would be better. I think you should use different initials.