- A diminutive of the male given name Nathanael, Nathaniel or Nathan.
- A diminutive of female given names such as Natasha, Natalie, and Natalia.
Nat (plural Nats)
- (slang, informal, UK politics) A member or supporter of the Scottish National Party.
- (slang, informal, South African politics, dated) A member or supporter of the National Party of South Africa.