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").
Ulster Scots dialects Ulster Scots or Ulster-Scots ("Ulstèr-Scotch "), also known as Ullans, is the Scots language as spoken in parts of Ulster in Ireland. It is generally considered a dialect or group of dialects of Scots, although groups such as the Ulster-Scots Language Society and Ulster-Scots Academy consider it a language in its own right, and the Ulster-Scots Agency and former Department of Culture, Arts and Leisure have used the terminology Ulster-Scots language.