It is pretty.
'not common' well, the name itself might not be common. But remember there is
Ella,
Eleanor, that are popular and sound like it. It has a rather generic sound IMO. Doesn't mean that there is something inherently wrong with the name though.
You could try
Eliora,
Flora,
Elodie,
Meliora,
Laura,
Laurel for similar sounds as well.