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HALLIHAN Family HistoryThis interesting surname is of early medieval Irish origin, and is an Anglicized form of the Gaelic "O hAilleachain", descendant of Ailleachan. "Ailleachan" is a personal name from a diminutive of "aille", beauty. Traditionally, Irish family names are taken from the heads of tribes, or from some illustrious warrior, and are usually prefixed by "O", grandson, male descendant of, or "M(a)c", denoting "son of". The surname is more usually spelt Hallahan or Hallihane, and is the name of an old but not very numerous Munster family belonging primarily to Co.
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