Authors: P
- Raban 1795-1870
- Rabelo, Manuel Pereira -
- Radin, Paul 1883-1959
- Radisson, Pierre Esprit -1710
- Radziwill, Catherine, Princess 1858-1941
- Raine, Allen 1836-1908
- Rajna, Pio 1847-1930
- Ramakrishna Pillai, T. (Thottakadu) 1854-
- Ramazzini, Bernardino 1633-1714
- Ramm, Alexandra 1883-1963
- Ramus, Petrus 1515-1572
- Randolph, Paschal Beverly 1825-1874
- Randolph, Vance 1892-1980
- Ranger, Philip, active 1615-1631 -
- Raphael, Alice 1887-1975
- Raphael, John N. (John Nathan) 1868-1917
- Ratcliffe, Dorothy Una 1891-1967
- Rauch, E. H. (Edward H.) 1826-1902
- Raymond, Percy E. (Percy Edward) 1879-1952
- Raymond, P. T. -
- Read, Opie Percival 1852-1939
- Reagan, Ronald 1911-2004
- Rebouças, Antonio Pereira 1798-1880
- Reclus, Élie 1827-1904
- Redington, Paul G. (Paul Goodwin) 1878-1942
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