- Pancoast, William H. (William Henry), 1834-18971
- Parada, Diego Ignacio.1
- Park, Roswell, 1852-19141
- Park, Roswell, 1852-1914, author3
- Parke, Davis & Company.1
- Parker, Edward H. (Edward Hazen), 1823-1896, author1
- Parker, Langston, 1805?-18711
- Parker, William H. (William Humboldt)1
- Parra, Porfirio, 1856-19122
- Parry, John S. (John Stubbs), 1843-18763
- Parry, John S. (John Stubbs), 1843-1876, author3
- Parsons, Charles W. (Charles William), 1823-1893, author2
- Parsons, S. B. (Scott Burrill), 1842-1900, compiler1
- Partridge, Edward L. (Edward Lassel), 1853-1930, author1
- Parvin, Theophilus, 1829-18983
- Parvin, Theophilus, 1829-1898 author1
- Parvin, Theophilus, 1829-1898, author1
- Pasalagua y Berruecos, Manuel A.1
- Pashutin, V. (Viktor), 1845-1901 author1
- Passo, José Gonçalves do.1