McCoy and Galloglass are both Anglicisations of terms from what language?
Gallowglass The gallowglasses (also spelt galloglass, gallowglas or galloglas; from Irish: "gall óglaigh" meaning foreign warriors) were a class of elite mercenary warriors who were principally members of the Norse-Gaelic clans of Scotland between the mid 13th century and late 16th century. As Scots, they were Gaels and shared a common background and language with the Irish, but as they had intermarried with the 10th century Norse settlers of western Scotland, the Irish called them "Gall Gaeil" ("foreign Gaels").
Béarlachas Béarlachas (] ) is Irish for words and phrases used in Irish that are influenced by or stem from the English language. The term comes from "Béarla ", the Irish word for the English language, and refers to both simple anglicisms and interlanguage forms. It is a result of bilingualism within a society where there is a dominant, superstrate language (in this case, English) and a minority substrate language with few or no monolingual speakers and a perceived "lesser" status (in this case, Irish).