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- R. Tucker Abbott (1919–1995), American conchologist and malacologist
- Reg Abbott (born 1930), Canadian ice hockey player
- Richard Abbott (Australian politician) (1859–1940), Australian politician
- Robert Abbott (game designer) (born 1933), American game inventor
- Robert Crowther Abbott (1869–1927), English Anglican bishop
- Robert Sengstacke Abbott (1870–1940), African American lawyer and newspaper publisher
- Roger Abbott (born 1946), English actor
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