Around 1250, King Henry III of England granted the cantred or district of Tradraighe (or Tradree) to Robert De Muscegros, who in 1251 cut down around 200 trees in the King's wood at Cratloe.
This ancient cantred of Oskelan was that of the "Ui-Scellain - the descendants of Scellan, sixth in descent from Aengus Osrithe, the founder of the kingdom of Ossory: according to Edmund Curtis's 1933 edition of the Ormond Deeds.
Upon the death of their father, on 1 September 1176, Gerald's elder brother William granted him half the cantred of Ophelan with centres at Maynooth and Rathmore.
De Burgh granted the barony or cantred of Gallen to Hugh de Lacy, who transferred it to Jordan de Exeter, who was in possession of it by 1239.