The project is primarily a yDNA surname project that welcomes those men who bear the name Harnett or Hartnett or a variant that can be shown to be associated with those two predominant roots of the surname. The Harnett/Hartnett family name is generally associated with the area from Abbeyfeale to Dromtrasna and Newcastle West in Co. Limerick.The name occurs frequently in the 16th Century Fiants, and is closer to the Gaelic "O' hAirtneada" Although the majority of the families of the name in the area are called Harnett, it is frequently pronounced Hartnett. The Hartnett version of the name is commonly used outside the West Limerick region.