Petronilla of Rome
- Hagiography raises the possibility that she is a martyr of the third century rather than the first.
- http://www.saintpatrickdc.org/ss/0531.htm#petr

Petronilla
- An examination of the story of St. Petronilla. By Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/petronilla.html

St. Petronilla
- Virgin, martyred at Rome, probably at the end of the first century. She has been venerated as a saint since at least the fourth century. Feast day: 31 May.
- http://www.newadvent.org/cathen/11781b.htm