| Name | Meaning | Gender | Origin |
|---|
| Pete | A rock. Form of Peter.
| Male | English |
| Pietro | Greek, rock | Male | Italian |
| Pinocchio | | Male | Hebrew |
| Pinstripe | | Unisex | |
| Pluto | The ninth and most distant planet from the sun | Male | |
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | |
| Ptolemy | aggressive, warlike | Male | Greek |
| Purcell | after composer Henry Purcell | Male | |
| Quin | Abbreviation of Joaquin.
| Male | |
| Quincy | Fifth: derived from Roman clan name.
| Male | |
| Rahjah | | Male | Hebrew |
| Randall | Variants of Randolph Wolf's shield. Surname.
| Male | English |
| Rasheed | Thinker: counselor.
| Male | |
| Rayas | | Unisex | |
| Raymon | Form of Raymond Guards wisely.
| Male | |
| Reebok | | Male | Hebrew |
| Reginald | powerful one | Male | English |
| Reilly | courageous | Male | Irish |
| Ren And Stimpy | | Male | Hebrew |
| Reuben | Behold a son | Male | Hebrew |
| Rhode Island | | Male | Hebrew |
| Rider | horseman | Male | English |
| Rigel | Foot. Rigel is a blue star of the first magnitude that marks the hunter's left foot in the Orion constellation.
| Male | |
| Ringo | apple, peace be with you | Male | English |
| Ripper | | Unisex | |