- Rilliet, F. (Frédéric), 1814-18612
- Ritter, Thomas, M.D1
- Rivers, Henry Wheaton.1
- Rivinus, Edward Florens, 1802-18731
- Rivinus, Edward Florens, 1802-1873 compiler1
- Robb, Patrick C.1
- Robert Bach & Co. (Firm).1
- Robertson, Archibald, 1789-18643
- Robertson, F. K.1
- Robertson, James J.1
- Robertson, John Argyll.1
- Robertson, Robert, 1742-1829, author5
- Robertson, William.1
- Robinson, A. C. (Alexander C.)2
- Robinson, Daniel A.1
- Robinson, John, -approximately 18292
- Robinson, Nicholas, 1697?-17751
- Robinson, Samuel, 1783-18267
- Rodgers, M. M. (Miles M.)1
- Rodriguez Argüelles, Anacleto.1