| Robert Baillie, Correspondent by (About) – Added December 16, 2021 | | |
| Roborough, Henry (d. 1649), Church of England clergyman by P. S. Seaver (About) – Added December 16, 2021 | | |
| Robrough, Henry (d. 1649), Church of England clergyman by P. S. Seaver (About) – Added May 24, 2023 | | |
| Rous, Francis (1580-81-1659), religious writer and politician by Colin Burrow (About) – Added May 24, 2023 | | |
| Rudyerd, Sir Benjamin (1572-1658), politician and poet by David L. Smith (About) – Added May 24, 2023 | | |
| Rutherford, Lex Rex, and the American Revolution by Donald Macleod (About) – Added December 16, 2021 | | |
| Rutherford, Samuel (c. 1600-1661), Church of Scotland minister and political theorist by John Coffey (About) – Added May 24, 2023 | | |
| Salvation by Faith: Faith, Covenant and the Order of Salvation in Thomas Goodwin (1600-1680) by Ryan M. McGraw (About) – Added December 16, 2021 | | |
| Salvation by faith: faith, covenant, and the order of salvation in Thomas Goodwin (1600-1680) by Hyo-nam Kim (About) – Added December 16, 2021 | | |
| Salwey, Humphrey (c. 1575-1652), politician and lawyer by C. H. Firth (About) – Added May 24, 2023 | | |
