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- Condé Benoist Pallen (USA, 1858–1929) English language encyclopedia
- Alfredo Panzini (Italy, 1863–1939) Italian language general dictionary
- Eric Partridge (New Zealand/Australia/UK, 1894–1979) English language dictionary of slang
- Franz Passow (Germany, 1786–1933) Greek language historical dictionary
- Hermann Paul (Germany, 1846–1921) German language historical dictionary
- Andrew Pawley (Australia/New Zealand, born 1941) Austronesian languages
- Clemente Peani (Italy/India, 1731–1782) Malayalam language dictionary
- Edmund Peck (Canada, 1850–1924) Inaktitut and English bilingual dictionary
- Philitas of Cos (Greece, c. 340–285 BC) Ancient Greek language glossary
- Philo of Byblos (Greece, c. 64–141 AD) Ancient Greek language dictionary of synonyms
- Sreekanteswaram Padmanabha Pillai (India, 1864–1946) Malayalam language dictionary
- Iwo Cyprian Pogonowski (Poland, USA, born 1921) Polish and English bilingual dictionaries
- Julius Pollux (Greece?, 2nd century) Ancient Greek language thesaurus
- Noah Porter (USA, 1811–1892) English language general dictionary
- Malachy Postlewayt (UK, 1707?–1767) English language LSP dictionary
Read more about this topic: List Of Lexicographers