McCoy and Galloglass are both Anglicisations of terms from what language?
McCoy (surname) McCoy is a common surname of Scottish origin in the lands of Kintyre and then Irish (Gallowglass) origin. It is an Anglicisation of its Irish Gaelic form Mac Aodha, meaning "son of Aodh" (an old word for "Fire", a Celtic deity). It is particularly found in Ulster (Counties Antrim, Armagh and Monaghan) where many settled around the 13th century, having been Gallowglasses, and also in counties Limerick and Cork. Aoidh and Mac Aoigh were sometimes Anglicised as Hugh and McHugh.
McGurn The name of McGurn, McGurran, Maggurran, Magorrin or Magurn, derives from an anglicisation of the older name of Mac-Samhradhain which can be spelled MacGauran, Magauran or McGovern. The owners of this name were chiefs of Teallach Eachach (translated as the tribe or region of the Ecchy) who had their territory in the Barony of "Tullaghagh", County Cavan. This name is pronounced by some people as "Somers", or "Summers" from the word "Samhradh" , which means summer.