Fenian
Fenian , noun
[From the Finians or Fenii, the old militia of Ireland, who were so called from Fin or Finn, Fionn, or Fingal, a popular hero of Irish traditional history.]
A member of a secret organization, consisting mainly of Irishmen, having for its aim the overthrow of English rule in Ireland.
Fenian , adjective
Pertaining to Fenians or to Fenianism.