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- Ola Raknes (Norway/USA, 1887–1975) Norwegian and English bilingual dictionary
- Stanislovas Rapalionis (Lithuania/Germany, 1485–1545) Lithuanian language
- Rasmus Christian Rask (Denmark, 1787–1832) Indo-European comparative linguistics
- Allen Walker Read (USA, 1906–2002) English language glossary
- James Redhouse (UK, 1811–1892) Turkish and English bilingual dictionary
- Gustaf Renvall (Finland, 1781–1841) Finnish language general dictionary
- Alain Rey (France, born 1928) French language general and LSP dictionary
- Barbara Reynolds (UK, born 1914) Italian language dictionary
- Kel Richards (Australia, born 1946) English language dialect dictionary
- César-Pierre Richelet (French, 1626–1698) French language general dictionary
- John Rider (UK/Ireland, 1562–1632) Latin language etymological dictionary
- William Rider (UK, 1723–1785) English language general dictionary
- Paul Robert (French, 1910–1980) French language general dictionary
- Joseph Francis Charles Rock (Austria/USA/PR China, 1884–1962) Naxi and English bilingual dictionary
- Peter Mark Roget (UK, 1779–1869) English language thesaurus
- Leo Rosten (Poland–Russia/USA, 1908–1997) Hebrew and English lexicon
Read more about this topic: List Of Lexicographers