Don´t joke - a child cannot be named after a peacock! It would be proper in earlier, totemistic stages of society, as with Phryne. Methinks, Pagona is found much earlier as first name and it would be something like Paulina or Pauline. In Russian, peacock is called pavlin and that´s why its female counterpart pavlina excluded the first name Pavlina (Pauline). Not quite orthodox name but it was used besides Pavla, Russian variant of Paula.
So all troubles were launched by a Paulus and a Pavo (peacock for Latin)!