Perenelle

Old French form of Petronilla borne by Perenelle Flamel (1320-1402), alchemist and wife of Nicolas Flamel. They are known for their quest to discover the philosopher's stone, a legendary substance said to turn any metal into gold and to make its owner immortal. The figure of Perenelle Flamel appeared in the Harry Potter series.

Would make for an unexpected route to sweet and sassy nickname Nellie or Nell.

Pronounced pair-uh-NEL.