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Gender: M Meaning of Callahan: "bright-headed" Origin of Callahan: Irish

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Callahan, the phonetic spelling of Callaghan, is a rhythmic jig of a name whose history harks back to the ancient King of Munster. In the Dirty Harry movies, the Clint Eastwood character is Harry Callahan.

Famous People Named Callahan

Pop Culture References for the Name Callahan

Spider Robinson wrote a series of books about a bar called Callahan's, run by Mike Callahan.
A teacher/lawyer in Legally Blonde

Alexander Callahan, known as "Cal" is a character in the Hex Hall series by Rachel Hawkins.

Dirty Harry aka Harry Callahan