Gahan (and its variant Gahame) is a surname with several different origins. One origin of the surname is from a reduced form of "McGahan", which is in turn an Anglicised form of the Irish language "Mac Eacháin", meaning "son of "Eachán"". Another origin of the name, in Leinster, is from a reduced form of the Irish language "Ó Gaoithin", meaning "descendant of "Gaoithín"". The personal name "Gaoithín" is a diminutive of "gaoth", meaning "wise", or "wind". In Connacht, "Ó Gaoithin" is sometimes Anglicised as "Wynne" or "Wyndham". Occasionally, the surname "Gahan" may be an Anglicised form of the Irish language "Mac Gaoithín", meaning "son of "Gaoithín"", although the more common Anglicised form of this Gaelic name is "McGeehan" in Ulster.
People with this surname include:
and at least one having it as a given name:
References.
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 Name listThis page or section lists people that share the same given name or the same family name. 