McAllister (surname) has many different spellings due to immigration. Some of the common spellings are McAllister (surname) McAllister is a surname from Scotland and Ireland that originates from the Gaelic name Mac Alasdair, meaning son of God. Alasdair is the Gaelic form of the first name Alexander. The Mc Alisters for the greater part owe their ancestry to the Scottish clan of the Mac Donalds. The name is derived from the personal name Alexander. The Mc Alisters arrived in Ulster as Gallowglasses at the invitation of the MacDonnell's. Today the greatest numbers of the name are to be found in counties Antrim,
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