Origin: 1505–15; < Irish gallóglách, equivalent to gall a stranger, foreigner + óglach a youth, soldier, servant, derivative of Old Irish óac, óc young
a heavily armed mercenary soldier, originally Hebridean (Gaelic-Norse), maintained by Irish and some other Celtic chiefs from about 1235 to the 16th century
[C16: from Irish Gaelic gallóglach, from gall foreigner + óglach, young warrior-servant, from og young + -lach a noun suffix]
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—n
[C16: from Irish Gaelic gallóglach, from gall foreigner + óglach, young warrior-servant, from og young + -lach a noun suffix]