Question: is gahan an irish surname?
Answer: 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". ... In Connacht, Ó Gaoithin is sometimes Anglicised as Wynne or Wyndham.