| Country | Day | Month | Names |
 Austria | 21 | February | Enrica, Gunthild, Petrus |
| Austria | 27 | April | Petrus, Zita |
| Austria | 31 | May | Helma, Mechthild, Petra |
 Denmark | 31 | May | Petronella |
 France | 31 | May | Pétronille |
 Hungary | 31 | May | Angéla, Petronella |
 Lithuania | 31 | May | Anele, Angele, Gintautas, Petronele, Rimvile |
 Poland | 31 | May | Aniela, Bożysława, Ernesta, Ernestyna, Feliks, Petronela, Petronia, Petroniusz, Teodor |
 Slovakia | 31 | May | Petronela |
 Spain | 31 | May | Visitación, Petronila, Amelia, Avelina |
 Sweden | 31 | May | Pernilla, Petronella |
 Ukraine | 31 | May | Petronella, Petrina, Petrunia |
 USA | 31 | May | Camila, Camilla, Camille, Petra, Petronella, Pier |
| Austria | 2 | June | Armin, Erasmus, Marcel, Petrus |
 Bulgaria | 29 | June | Apostol, Kamen, Pavel, Pavlin, Pavlina, Pejo, Penka, Pencho, Petrana, Petar, Petya, Petzo, Petar, Petya, Pavel, Pavlina, Polina, Kamen, Asen, Asya, Desislava, Krym, Rumen, Rumyana, Chavdar, Asen, Asya, Desislava, Krum |
| Denmark | 29 | June | Petrus |
 Finland | 29 | June | Pekka, Petri, Petra, Peetu, Pekko, Petteri, Pietari, Petrus, Petja |
 Greece | 29 | June | Petros, Peter, Petrina, Paul |
| Lithuania | 29 | June | Benita, Gedrime, Mantigirdas, Petras, Povilas |
| Sweden | 29 | June | Peter, Petra |
| Austria | 30 | July | Ingeborg, Inga, Petrus |
 Norway | 1 | August | Peder, Petra |
 Czechia | 17 | August | Petra |
| Hungary | 2 | October | Petra |
 Croatia | 18 | November | Petra, Pavla |
