Family name Rennell (Rennell 
) , around the world, is a rare cognomen. The cognomen Rennell is habitual in New Zealand, where it is a rare surname, Australia, and the United States, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and New Zealand. Also, Rennell is the forename as well as the last name.
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| Rennell | Philippines, United Kingdom, Australia, New Zealand, United States |
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james rennell English geographer, historian and oceanographer (1742–1830), GB (b. 1742) |
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| thomas rennell English churchman, dean of Winchester Cathedral and Master of the Temple (b. 1754) |
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| thomas rennell English theologian and author (b. 1787) |
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| rennell coleridge (1858-1934) (b. 1858) |
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| mary rennell British painter (1901-1981), GB (b. 1901) |
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| kyle rennell researcher ORCID ID = 0000-0002-8204-5469 |
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| jane rennell Peerage person ID=680643 |
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| paul rennell New Zealand association footballer, NZ |
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| thomas rennell Peerage person ID=243792 |
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| sara eliza rennell d.1869 |
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| rebecca rennell archaeologist |
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| william blackstone rennell (died 1912) |
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