Phoebe and Penelope pop, now and then, in Victorian novels. Phoebe for servants and ordinary people, it wasn't unusual (Penelope less so). Both have remained in use. I'd be surprised at people not having heard of those names, pre Friends. Though I never did watch Friends, actually.
We have other ordinary names introduced later than that. Another Greek name, people might not recognise as Greek (without Google), and used 200 years later than the above is Melissa.