| W. M. R. | William Michael Rossetti.- See the biographical article: Rossetti, Dante G.
| | Perino del Vaga; Perugino, Pietro. |
| W. M. Ra. | Sir William Mitchell Ramsay, LL.D., D.C.L., D.Litt.- See the biographical article: Ramsay, Sir W. M.
| | Phrygia; Pisidia. |
| W. P. C. | William Prideaux Courtney.- See the article: Courtney, Baron.
| | Peterborough and Monmouth, Earl of. |
| W. R. M. | William Richard Morfill, M.A. (d. 1910).- Formerly Professor of Russian and the other Slavonic Languages in the University of Oxford. Curator of the Taylorian Institution, Oxford. Author of Russia; Slavonic Literature; &c.
| | Poland: Literature. |
| W. R. S. | William Robertson Smith, LL.D.- See the biographical article: Smith, William Robertson.
| | Phylactery (in part). |
| W. R. S.* | William Roy Smith, M.A., Ph.D.- Associate Professor of History, Bryn Mawr College, Pennsylvania. Author of Sectionalism in Pennsylvania during the Revolution; &c.
| | Polk, James Knox. |
| W. S. R. | William Smyth Rockstro.- Author of A Great History of Music from the Infancy of the Greek Drama to the Present Period; and other works on the history of music.
| | Plain Song. |
| W. T. T.-D. | Sir William Turner Thiselton-Dyer, F.R.S., K.C.M.G., C.I.E., D.Sc, LL.D., Ph.D., F.L.S.- Hon. Student of Christ Church, Oxford. Director, Royal Botanic Gardens, Kew, 1885–1905. Botanical Adviser to Secretary of State for Colonies, 1902–1906. Joint-author of Flora of Middlesex.
| | Plants: Distribution. |
| W. W. R.* | William Walker Rockwell, Lic.Theol.- Assistant Professor of Church History, Union Theological Seminary, New York.
| | Pius VI., VII., and VIII. |
| W. Y. S. | William Young Sellar, LL.D.- See the biographical article: Sellar, W. Y.
| | Petronius (in part). |
