Callahan.
A surname from Irish.
Meaning & usage
A surname from Irish.
A male given name transferred from the surname.
A place in the United States: An unincorporated community in Siskiyou County, California.
A place in the United States: A town in Nassau County, Florida.
A place in the United States: A neighbourhood of Orlando, Florida.
Where this word comes from
From Irish Ó Ceallacháin, from Ceallachán, diminutive of the given name Ceallach. Doublet of Kelly and Kellogg.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.