Gaffney
Gaffney is a surname common to the region of Cavan in Ireland, and now spread across other English-speaking nations. Gaffney comes from the Gaelic septs of Ó Gamhna, Mac Conghamhna and Ó Caibheanaigh. Gaffney more commonly does not appear with the Gaelic prefixes of O' or Mc but there have been Gaffneys recorded with either of the Gaelic prefixes.