Griffin is a surname of primarily Irish origin. Griffin was the 75th most common surname on the island of Ireland in 1891. It was estimated in 2000 that Griffin is the 114th most common surname in the U.S., with a population in the order of two hundred thousand. == Griffin in Ireland == The surname "Griffin" has a number of sources in Ireland. === Uí Ghríofa === The spelling Ó Gríofa (male) or Ní Ghríofa (female) is associated with the Co. Clare family, whose surname was also anglicised as O…