| PR | Penny Robinson | fictional character from Lost in Space |
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Pepe | Portuguese association football player |
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Pep Guardiola | Spanish association football manager and player (born 1971) |
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Peppa Pig | British preschool animated television series |
| PP | Pepper Potts | fictional character from Iron Man |
| PS | Percy Shelley | English potter (1860–1937) |
| P"O | Per "Dead" Ohlin | Swedish vocalist (1969–1991) |
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Père Goriot | 1835 novel by Honoré de Balzac |
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PerkZ | Professional League of Legends player |
| P | Perona | fictional character from One Piece |
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Perry Cox | fictional character from Scrubs |
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Peru | sovereign state in South America |
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Pete Burns | English singer (1959–2016) |
| PC | Pete Campbell | fictional character from Mad Men |
| PD | Pete Dominick | American stand-up comedian and radio host |
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Pete Hegseth | United States Secretary of Defense |
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Pete Maverick Mitchell | fictional character from Top Gun |
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Peter Atkins | British chemist |
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Peter Bogdanovich | American film director (1939–2022) |
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Peter Boghossian | American philosophy professor and author |
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Peter Cetera | American musician (born 1944) |
| PC | Peter Clemenza | fictional character from Godfather trilogy |
| PC | Peter Coffin | Canadian Anglican bishop |
| PC | Peter Coffin | (1630-1715) |
| PC | Peter Coffin | American artist (born 1972) |
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Peter Diamandis | Greek-American engineer, physician and entrepreneur |
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Peter Drucker | American business consultant (1909–2005) |
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Peter Falk | American actor (1927–2011) |
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Peter Fonagy | British psychoanalyst & psychologist |
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Peter Frankopan | British historian |
| PG | Peter Gregory | fictional character from Silicon Valley |
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Peter Higgs | British physicist and Nobel Prize winner (1929–2024) |
| PH | Peter Hogarth | fictional character from His Master's Voice |
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Peter Hook | British bassist |
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Peter I of Serbia | Serbian noble (1844–1921); King of Serbia from 1903 to 1918 |
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Peter Jackson | New Zealand film director, screenwriter, producer and actor (born 1961) |
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Peter Jones | British businessman |
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Peter Joseph | filmmaker and social activist |
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Peter Jurasik | American actor |
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Peter Krause | American actor (born 1965) |
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Peter Lamborn Wilson | American political writer, poet, and essayist (1945–2022) |
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Peter Leko | Hungarian chess player |
| PL | Peter Levine | philosopher, author |
| PL | Peter Lynch | American investor, mutual fund manager |
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Peter Navarro | American economist and author, Trump advisor (born 1949) |
| PN | Peter Norton | American programmer, software publisher |
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Peter Norvig | American computer scientist |
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Peter Pan (Disney) | fictional character from Peter Pan |
| PP | Peter Parker | British biochemist |
| PP | Peter Parker |