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").
Pseudo-anglicism Pseudo-anglicisms are words in languages other than English which were borrowed from English but are used in a way native English speakers would not readily recognize or understand. Pseudo-anglicisms often take the form of compound words, combining elements of multiple English words to create a new word that appears to be English but is unrecognisable to a native speaker of English. It is also common for a genuine English word to be used to mean something completely different from its original meaning.