A sister, for [name]Aurora[/name], who always goes by [name]Rory[/name].
What would you suggest?
([name]Just[/name] theoretical!)
[name]Imogen[/name] was the name that I thought of first after hearing [name]Aurora[/name], I think they complement each other without being too matchy, they can stand alone as well as sounding well together!
[name]Brea[/name]
[name]Coraline[/name]
[name]Eleanor[/name]
[name]Grace[/name]
[name]Hazel[/name]
[name]Imogen[/name]
[name]Maeve[/name]
[name]Matilda[/name]
[name]Rose[/name]
[name]Wren[/name]
[name]Aurora[/name] and…
[name]Evangeline[/name]
[name]Penelope[/name]
[name]Nadia[/name]
[name]Leona[/name]
[name]Isabella[/name]
[name]Emmeline[/name]
[name]Delilah[/name]
[name]Genevieve[/name]
[name]Juliet[/name]
[name]Mirabel[/name]
[name]Aurora[/name] and [name]Estelle[/name]. They both have a starry/celestial meaning, and sound gorgeous together!
I agree with tess27 I think [name]Aurora[/name] ‘[name]Rory[/name]’ and [name]Imogen[/name] would go really well together.
[name]Florence[/name]
[name]Darcy[/name]
[name]Isla[/name]
[name]Louisa[/name]
[name]Willow[/name]
[name]Amelia[/name]
[name]Eliza[/name]
[name]Ivy[/name]
[name]Aurora[/name] is beautiful! I really like the previous suggestions, especially [name]Estelle[/name] and [name]Imogen[/name].
[name]Iris[/name] (rainbow)
[name]Beatrix[/name]
[name]Lorelei[/name]
[name]Vivian[/name]
[name]Aurora[/name] and …
[name]Charlotte[/name]
[name]Evangeline[/name]
[name]Frances[/name]
[name]Cecily[/name]
[name]Olivia[/name]
[name]Violet[/name]
[name]Imogen[/name]
[name]Scarlett[/name]
[name]Rachel[/name]
[name]Penelope[/name]
[name]Genevieve[/name]
[name]Adelaide[/name]
[name]Caroline[/name]
[name]Elizabeth[/name]
[name]Aurora[/name] and [name]Vesper[/name]! (The dawn and the evening).
[name]Aurora[/name] is beautiful and might go nicely with
[name]Naomi[/name]
[name]Ariel[/name]
[name]Ashley[/name]
[name]Olivia[/name]
[name]Scarlett[/name]
[name]Paige[/name]
[name]Love[/name] [name]Aurora[/name]!
[name]Violet[/name]
[name]Charlotte[/name]
[name]Lillian[/name]/[name]Liliana[/name]/[name]Lilibet[/name]
[name]Zara[/name]
[name]Helena[/name]
[name]Beatrix[/name] (could start a cool alphabet theme, too–I don’t like matchy-matchy, but I’m a sucker for an alphabet theme!)
[name]Georgiana[/name]
[name]Penelope[/name]
[name]Portia[/name]
[name]Magdalena[/name]
Good luck!
Something whimsical but substantial at the same time -
[name]Zara[/name]
[name]Coralie[/name]
[name]Freya[/name]
[name]Thora[/name]
[name]Thea[/name]
[name]Isla[/name]
[name]Violet[/name]
[name]Felicity[/name]
[name]Iris[/name]
[name]Hazel[/name]
[name]Leila[/name]
[name]Love[/name] suggestions of [name]Evangeline[/name] ([name]Evie[/name]/[name]Van[/name]) mirabelle (belle), [name]Coralie[/name] and [name]Emmeline[/name] (particularly love [name]Emmeline[/name] with [name]Aurora[/name]!!) I would also love to see [name]Aurora[/name] (rory) and sister [name]Lavender[/name], [name]Lavinia[/name] (vinny) [name]Serafina[/name] (fin) [name]Luciana[/name] ( [name]Luna[/name]) [name]Lucia[/name] (lulu), [name]Valentina[/name] ([name]Leni[/name])… Absolutely love [name]Leni[/name] and [name]Rory[/name] ([name]Valentina[/name] and [name]Aurora[/name] 
The first name I thought of was [name]Lucinda[/name]. [name]Aurora[/name] and [name]Lucinda[/name] or [name]Rory[/name] and [name]Cindy[/name]
Some others might be
[name]Marta[/name]
[name]Sabrina[/name]
[name]Francine[/name]
[name]Olivia[/name]
[name]Arielle[/name]
[name]Daphne[/name]