Names to go with sisters name.

Mattie • 25. Mommy to one beautiful little 5 year old girl & another girl on the way
Still so indecisive. I cannot for the life of me pick a name. Everything is so old sounding or too common right now, or I'll come up with something and next thing you know there's 85 of them on the sites I use. 
I'm trying to find something to go with her sisters name, which is Sofie. 
I don't like names such as Penelope, Lily, Ariana, Amelia... You get my drift I hope. 
I'm so lost 😩