William Rathbone Greg was an English essayist.

William Rayner was a UK writer of novels for adults and children. After working as a teacher and lecturer, Rayner published a number of books, often historical fiction, including the unfinished "Devil's Picture-Book" trilogy. His two YA novels, Stag Boy and Big Mister incorporated fantasy elements.

William Fiddian Reddaway was an academic and author in the very late 19th and early 20th centuries.

William Reed Huntington was an American Episcopal priest and author, and known as the "First Presbyter of the Episcopal Church."

William Richard Cutter was an American historian, librarian, genealogist, and writer.

William Rishanger, nicknamed "Chronigraphus", was an English annalist and Benedictine monk of St. Albans. Rishanger quite likely wrote the Opus Chronicorum, a continuation from 1259 of Matthew Paris's Chronicle. In effect it is a history of his own times from 1259 to 1307, a spirited and trustworthy account, albeit in parts not original. He wrote a history of the reign of Edward I of England, and a work on the Barons' War; and was probably the continuator of Gesta Abbatum Monasterii Sancti Albani.

William Ritchie Sorley, FBA, usually cited as W. R. Sorley, was a Scottish philosopher. A Gifford Lecturer, he was one of the British Idealist school of thinkers, with interests in ethics. He was opposed to women being admitted as students to the University of Cambridge.

Sir William Robertson Nicoll was a Scottish Free Church minister, journalist, editor, and man of letters.

William Robinson Clark was a Scottish-Canadian theologian.

William Roetzheim is an American poet, publisher and playwright. He is the editor of the Regional Best series anthology of American plays.