Last name Grosett (Grosett 
) , around the world, is a very rare cognomen. The cognomen Grosett is characteristic of the United Kingdom, where it is a very rare surname, the United States, where it is an extremely rare surname, and Canada.
| VARIANT | COUNTRY |
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| Grosett | Canada, United Kingdom, United States |
| john grosett British Member of Parliament (died 1866) (b. 1784) |
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| cecilia jane grosett (1805–1851) (b. 1805) |
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| walter grosett British Royal Navy officer, rear admiral in 1846 (died 1847) |
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| walter grosett m.1800 |
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