Patron Saint of of Mountain Travelers & Invoked Against Fever
Petronilla, a first century virgin and martyr, is traditionally identified as the daughter of Saint Peter, which is entirely possible as Scripture mentions that it was Saint Peter’s wife that Jesus healed and who then began waiting on Our Lord and His apostles. It is also believed she may have been a convert of Saint Peter and thus his "spiritual daughter." Tradition has it that Saint Peter cured Saint Petronilla of palsy.
She was also related to St. Domitilla, who was exiled in the first century to Pandateria, which later was used as a catacomb cemetery. Inscriptions there describe Petronilla as a virgin and martyr.