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- Robert J. Kelly (born 1938), United States Navy admiral who was commander in chief of the Pacific Fleet between 1991 and 1994
- Robert F. Kelly (born 1935), United States federal judge
- Robert P. Kelly, former CEO of The Bank of New York Mellon
- Robert Laurens Kelly, anthropologist
- Robert Talbot Kelly (1861–1934), English orientalist landscape and genre painter
- Robert Kelly (navy) (1913–1989), executive officer of Motor Torpedo Boat Squadron 3 in World War II
- Robert Kelly Jr., accused in the Little Rascals day care sexual abuse trial
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