Authors: Richard
- O'Brien, R. Barry (Richard Barry) 1847-1918
- Olin, Richard 1934-
- Orage, A. R. (Alfred Richard) 1873-1934
- Orpen, Adela E. (Adela Elizabeth Richards) 1855-1927
- Osborne, Robertson -
- Owen, Richard 1804-1892
- Pardee, R. G. (Richard Gay) 1811-1869
- Parker, Barry 1867-1947
- Parker, Richard Green 1798-1869
- Parkinson, Richard 1797-1858
- Pearson, Richard 1765-1836
- Penn, Richard 1784-1863
- Phillips, R. (Richard), Sir 1767-1840
- Pierce, Frank Richardson 1881-1966
- Pike, Richard -
- Power, R. A. (Richard Anderson) 1888-1974
- Powers, Richard M. 1921-1996
- Preston, R. M. P. (Richard Martin Peter) 1884-1965
- Price, Richard 1723-1791
- Procter, H. R. (Henry Richardson) 1848-1927
- Proctor, Richard A. (Richard Anthony) 1837-1888
- Pughe, G. R. G. (George Richard Gould) -
- Quaintance, Richard -
- Raby, Richard -
- Rainolde, Richard -1606
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