The McCain DNA focuses on McCain families from the nine counties in Ulster (Antrim, Armagh, Cavan, Donegal, Derry, Down, Fermanagh, Monaghan, and Tyrone.  Anglicised forms of the name include McCain,McCaine, McKaine, McKane, McKean, and McKeen.  To date there are two primary McCain families that have been located called the 01 McCain family and the 02 McCain family. 

The 01 McCain family descends from the Mac Eáin family of Kilmichael Glassary parish in mid Argyll. The 01 McCain family migrated to Donegal in the late 1500s and are now well established in Donegal, Tyrone, Derry, and Antrim.  They are linked to the historical figure of William McKean the Soldier of Mongavlin, Donegal (early 1600s).  Some notables in this family are James McKeen, co-leader of the 1718 fleet, Admiral John Sydney McCain of Teoc, Mississippi, Donnchadh Mór Mac Eáin baliff for the Earl of Argyll in the early 1500s.

blog address for the 01 McCain family: http://maceain.blogspot.com/

The 02 McCain family has some links to County Cavan. This is the family of Thomas McKean the Signer and of Alexander McCaine, the ante bellum Southern Methodist theologian and writer. 

The 03 McCain group is the Mac Eain of Glencoe and Mac Eain family of Ardnamurchan.

Please visit our website at: mccaindna.ulsterheritage.com/