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.
Mullaney Mullaney is a surname of Irish origin (from Connacht). It is an Anglicised form of the Gaelic "Ó Maoil Sheanaigh" meaning "descendant of "Maoilsheanaigh"". The Gaelic personal name "Maoilsheanaigh" means "devotee of (Saint) "Seanach"" and the personal name "Seanach" is made up of the element sean meaning "ancient", "old". Many spellings of Connacht named omit the "Sh" and in consequence one theory is that "Mullaney" may be an Anglicisation of "Ó Maoileanaigh" "descendant of "Maoileanach"". The personal name "Maoileanach" means "chief of the marsh". An Ulster family, unrelated to the Connacht family, bore the name "Ó Maoileanaigh".