McGeachie (mag eacaro), MacGaugh (mag eacada), MacGeagh (mag eacada). McCaughan an Anglicized form of the Old Gaelic MacEachain, son of Eachain. An Ulster surname, recorded in the Counties of Antrim, Down, Londonderry and Tyrone. Some families of Mc Caughen changed their name to MacCaughey, itself an Anglicized form of the Ulster name Mac Eachaidh, son of the Horseman or Horse Lord. The Scots names MacGeachie and MacGeachy are also derived from Mag Eochaidh. McGachy, McGeachy. An anglicized version of the Gaelic 'Mac Eochaidh'. A surname in both Ulster and Scotland. William McGaheye settled in York, Virginia, in 1653, and Alexander McGeachy,
Mac and Mc together A 2007 book in its tenth edition states that "most library catalogs" sort Mac and Mc names as if spelled M-a-c. Among the guides which generally recommend separating Mac and Mc so that names will be sorted as they are spelled are ISO 999, The Chicago Manual of Style, "Butcher's Copy-editing: The Cambridge Handbook for Editors, Copy-editors and Proofreaders", "The New York Times Manual of Style and Usage", and "The SBL Handbook of Style". Mac and Mc together A convention of sorting names with the Scottish and Irish patronymic prefixes Mac and Mc together persists in library science and archival