Others
- Robert A. Cook (1912-1991), president of The King's College
- Robert Manuel Cook (1909–2000), classical scholar and archaeologist
- Robert F. Cook, Christian missionary in India
- Robert L. Cook (b 1952), computer graphics designer
- Robert O. Cook, American sound engineer
- Robert Raymond Cook, Canadian murderer
- Robert Cook (programmer), game designer and co-founder of Metaweb
- Robert Cook (veterinarian), American veterinarian and professor
- Derek Raymond (1931–1994), English writer, real name Robert Cook
- Bob Cook, ice hockey player
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