In the works of Harry Turtledove, characters with the given name Calvin:
- Calvin Coolidge, historical President of the United States, appearing in American Empire: The Center Cannot Hold.
- Calvin Washington, fictional butcher, minor character in Settling Accounts: In at the Death.
- Calvin Armstrong, fictional United States Army lieutenant, minor character in Joe Steele.
Characters with the middle name Calvin:
Characters with the surname Calvin:
Cal may refer to:
- Cal (Disunited States), a soldier and minor character in The Disunited States of America.
- Cal (The Valley-Westside War), the Chairman of the City Council of Westside in The Valley-Westside War.
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