I feel like these are the best stylistic match! They’re short, spunky, and unique but with familiar sounds. They’re neither vintage nor modern, but timeless quirky or strong picks.
The ones that jump out to me as immediate fits:
[name_f]Ginevra[/name_f]
[name_f]Suvi[/name_f]
[name_f]Katri[/name_f]
[name_f]Elara[/name_f]
[name_f]Aoife[/name_f]
[name_f]Opal[/name_f]
[name_f]Saoirse[/name_f]
[name_f]Orla[/name_f]
[name_f]Effie[/name_f]
[name_u]Seren[/name_u] (maybe too close in sound as a sibling to [name_f]Sarai[/name_f])
I think [name_f]Heidi[/name_f], [name_f]Flora[/name_f], [name_f]Juno[/name_f], [name_f]Elara[/name_f], [name_f]Aurelia[/name_f] and [name_f]Mavis[/name_f] certainly deserve a place on the list!
Heidi
[name_f]Juno[/name_f]
[name_f]Katri[/name_f]
[name_f]Suvi[/name_f]
[name_f]Cleo[/name_f]
[name_f]Orla[/name_f]
[name_u]Indie[/name_u]
[name_f]Jovie[/name_f]
[name_f]Embla[/name_f]
[name_f]Aoife[/name_f]
I think these names fit your style of short 2 syllable unique names