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").
Ferrell Ferrell is a surname of Irish origin which comes from the Irish "Ó Fearghail". Although there is some speculation of the exact definition, the original Irish Gaelic spelling is Ó Fearghail, and is most commonly believed to mean "Man of Valor."