All of these are nice names, but I think I like Estéa best. Something about that accented e that just sounds so pretty to me! [name_f]Este[/name_f] would be a really fun nn to [name_f]Esther[/name_f], too!
I like Estia because it reminds me of [name_f]Hestia[/name_f]. It gives the name a very cosy feel.
Obviously there’s [name_f]Esther[/name_f], [name_f]Estelle[/name_f]
Estea is nice. Not sure about Estia.
The name Stiorra is a literary name meaning star. I quite like the idea of Estiorra.