Globally, Dennett (Dennett 
) is a very rare epicene first name. The forename Dennett is characteristic of Northern America, particularly the United States, where it is a very rare gender-neutral name. Much more frequently, Dennett is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Dennett | Australia, Canada, New Zealand, United Kingdom, United States |
| pruett mullens dennett British flying ace, GB (b. 1899) |
|
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| prescott freese dennett American prisoner (b. 1907) |
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