Grennan.
A surname from Irish.
Meaning & usage
A surname from Irish.
Where this word comes from
* As an English surname of Norman origin, from Old French grenon (“mustache”), from Vulgar Latin *granonem (“facial hair, mustache”), from Frankish *granu, from Proto-Germanic *granō (“awn, beard-hair, hair-tips, mustache”). * As an Irish surname, variant of Greenan.
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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.