Petru merkilegu heiti: Heppinn, Örlátur, Nútíma, Gaum, Rokgjarnt. Fá Petru merking nafns.
Petru Uppruni fornafns. Romanian and Corsican form of Peter. It is also the form used in the Church Slavic New Testament. Fá Petru Uppruni fornafns.
Petru nafn diminutives: Petrica. Fá Gælunöfn fyrir Petru.
Samheiti fyrir Petru í mismunandi löndum og tungumálum: Bedros, Botros, Boutros, Butrus, Peadar, Pece, Peder, Pedr, Pedrinho, Pedro, Péter, Peer, Peers, Peeter, Pétur, Pehr, Peio, Pèire, Pejo, Pekka, Pelle, Penko, Per, Pere, Perica, Perig, Pero, Peru, Petar, Pete, Peter, Petera, Peti, Petia, Petr, Petras, Petre, Petri, Petro, Petros, Petruccio, Petrus, Petter, Petteri, Petur, Petya, Piaras, Pier, Pierino, Piero, Pierre, Pierrick, Piers, Piet, Pietari, Pieter, Pietro, Pika, Piotr, Pit, Pitter, Pyotr. Fá Petru á öðrum tungumálum.
Algengustu nöfnin með eftirnafninu Bowier: Ray, Santiago, Peter, Michael, Leticia, Letícia, Michaël, Péter. Fá Nöfn sem fara með Bowier.