McLaughlin (surname) McLaughlin (surname) M(a)cLaughlin is the most common English form of "Mac Lochlainn", a masculine surname of Irish origin. The feminine form of the surname is "Nic Lochlainn". The literal meaning of the name is "son of "Lochlann"". Note that "Mc" is simply a contraction of "Mac", which is also (albeit rarely) truncated to "M' ". Thus, "MacLaughlin", "McLaughlin" and "M'Laughlin" are the same Anglicism, the latter two merely contractions of the first. The original surname Mac/Nic Lochlainn was borne by a family of Cenél nEógain, a branch of the historic northern O'Neill dynasty, reputedly founded by Niall Noígíallach. This family
McLoughlin McLoughlin McLoughlin is one of nearly two dozen Anglicisms for three Gaelic-Irish surnames: Mac/Nic Lochlainn (most commonly Anglicised "McLaughlin"), Ó/Ni Máoilsheáchlainn (usually "McLoughlin" or "M'Loughlin"), and Mac/Nic Lochnaigh (usually rendered Loughney but occasionally "McLoughlin" or "MacLoughlin"). "Mac" and "Ó" are masculine prefixes; "Ni/Nic" is feminine. Mac is rendered into English as "Mac", "Mc" and "M"'. Ó is rendered "O' ". The feminine prefix is rendered into English according to its masculine counterpart (e.g. Nic na Mhara > McNamara, Ni hEaghra > O'Hara). They are used with names that originated as patronymics. Occasionally, the prefix "Mael/Maol" is Anglicised "Mac/Mc". The surname