31 May | Austria | Helma, Mechthild, Petra | Croatia | Krunoslava, Marija, Petronila, Vladimir | Czechia | Kamila | Denmark | Petronella | Estonia | Elga, Helga, Helge, Helgi, Helja, Helje, Heljo, Helju, Olga, Olli | Finland | Helga, Helka | France | Pétronille | Hungary | Angéla, Petronella | Latvia | Alīda, Jusma, Jusmins | Lithuania | Anelė, Angelė, Gintautas, Petronėlė, Rimvilė | Norway | Pernille, Preben | Poland | Aniela, Bożysława, Ernesta, Ernestyna, Feliks, Petronela, Petronia, Petroniusz, Teodor | Romania | Ermie | Russia | Alexandra, Faina, Julia | Slovakia | Petrana, Petronela | Spain | Petronila, Visitación | Sweden | Pernilla, Petronella |
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