Authors: Ro
- Payró, Roberto Jorge 1867-1928
- Payson, George 1824-1893
- Peabody, Robert Swain 1845-1917
- Pears, James Roberts -
- Peary, Robert E. (Robert Edwin) 1856-1920
- Peck, Robert Morris 1839-1909
- Peel, Robert -
- Pendexter, Hugh 1875-1940
- Pennell, Elizabeth Robins 1855-1936
- Pennell, Robert F. 1850-1905
- Pert, Camille 1865-1952
- Pertwee, Roland 1885-1963
- Peter I, Emperor of Russia 1672-1725
- Peter, Robert 1805-1894
- Peterson, Robert, active 1576-1606 -
- Petherick, Rosa C. 1871-1931
- Peyser, Ethel R. (Ethel Rose) 1887-1961
- Phillips, Leroy 1870-
- Phillips, Rog 1909-1965
- Phillips, Roland Ashford -
- Philp, Robert Kemp 1819-1882
- Pietrocòla-Rossetti, T. (Teodorico) -
- Pinkerton, Robert E. (Robert Eugene) 1882-1970
- Pinto, Alexandre Alberto da Rocha de Serpa 1846-1900
- Pinto da Rocha -1930
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