There are many different families of MacAulays from both Ireland and Scotland which are not related and are considered to have no historical connection with Clan MacAulay. These include the Scottish Macaulays from the Western Isles (the Macaulays of Lewis and possibly the MacAulays of Uist). Irish families of MacAulays with no connection with Clan MacAulay are the McAuleys of Co Offaly and Co Westmeath, the McAuleys in Ulster (Co Fermanagh), and the 'MacAuleys of the Glens' (Co Antrim). The 'MacAuleys of the Glens', however, have been thought to have been originally Scottish.