Encyclopedias, Almanacs, Transcripts, and Maps
- Ruíz y Flores, Leopoldo
- Rukeyser, Merryle Stanley
- Rukeyser, Muriel
- Rule of Faith
- Rules of Law (Regulae Iuris)
- Ruma or Arumah
- Rumi, Jalaluddin (1207–1273)
- Rumkowski, Chaim Mordechai
- Rummel, Joseph Francis
- Rumpler, Eduard
- Runitsch, Ossip
- Runkel, Solomon Zalman
- Rupert of Deutz
- Rupert of Ottobeuren, Bl.
- Rupert of Salzburg, St.
- Ruppin, Arthur
- Rushdie, Salman (1947– )
- Russell (Originally Levy), Henry
- Russell, Bertrand
- Russell, John