Zoë

Those saying the ë is pretentious…. No, it’s there for a reason. It indicates that the vowels are pronounced separately. It’s a Greek name, like Phoebe, where ‘oe’ is pronounced ‘ee’. So Zoe would be Zee. Or if ignoring the Greek-ness and using English conventions, Zoe would be pronounced Joe. See also naïve (ny-eve, not ‘nave’), and Anaïs (An-a-ees, not ‘anays’). Letters are used for a reason usually. Ë vs E makes a difference. This also renders ‘Zoey’ unnecessary.

Pronounced Zo-ay.

I think this makes more sense then Zoe because Zoe would be pronounced Zo. But the "ë" makes it sound like Zo-ee.