Ellie's in the top 50 (more if you consider the Ellas and Eleanors who go by Ellie) and Harper's top 10. I majorly eye-rolled when she said it's "unique".
Regarding Ofek, this person lives in a Hebrew-speaking country so I assume it's an accepted name there (although BtN lists it as masculine, but BtN doesn't tend to have the best data on Hebrew names). I can't help but think that it sounds like an exclamation I might shout when I stub my toe, though.