| Part of speech | unknown part of speech |
|---|
| Nominative | Petro |
|---|---|
| Accusative | Petron |
| Afrikaans | Pieter |
|---|---|
| Catalan | Pere |
| Dutch | Petrus; Peer; Peet; Peter; Piet; Pieter |
| English | Peter |
| Faeroese | Pætur |
| French | Pierre |
| Greek | Πέτρος |
| Italian | Piero |
| Jamaican Patois | Piita |
| Polish | Piotr |
| Portuguese | Pedro |
| Russian | Пётр |
| Welsh | Pedr |
| West Frisian | Pyt |