McWilliamWiktionary 原文演变路径（由近及远）英语源自 ←爱尔兰语 源自 ←苏格兰盖尔语 Mac Uilleim “son of Uilleam”词源说明Anglicized form of Irish and Scottish Gaelic Mac Uilleim (“son of Uilleam”), a Gaelicized form of William.释义（英文）专有名词 Proper nounA surname.