The Cosgrove Family

Cosgrove family crest

(Crest No. 123. Plate 64.)

THE Cosgrove family is descended from Milesius, King of Spain, through the line of his son Heremon. The founder of the family was Laogare, ancestor of the Southern Hy Nials and son of Nial of the Nine Hostages, King of Ireland, A. D. 379. The ancient name was Cosgrach, which signifies “Victorious.”

The MacOscars and MacOsgars (Anglicized McCuskers and Cosgroves), according to O’Dugan, possessed a territory called Fearra Rois—signifying the Men of the Ross—which comprised the district of Magheross about the town of Carrickmacross, in the County of Monaghan, with the parish of Clonkeen adjoining, in the County of Louth. In ancient times the O’Cosgroves, with the O’Keefes and O’Dugans, were chiefs in Fearmuighe Feiné, now the barony of Fermoy, in the County of Cork. The O’Cosgroves were also chiefs in Sualan, which comprised the greater part of the barony of Ballinacor, called O’Byrne’s Country, in the County of Wicklow. In the County of Wexford the O’Cosgroves were chiefs of Beantraide, now the barony of Bantry.

The McCoscrys, or Cosgroves, in Wicklow County and Queens County, changed their names to Lestrange or L’Estrange.