McTernan family crest
The Irish surname McTernan is an anglicized form of the Gaelic name Mac Thighearnáin meaning “son of Tighearnan.” The name is popular in the northern province of Ulster, particularly in counties Cavan and Donegal.  A noted bearer of the name McTernan is the accomplished Australian actor John McTernan who is descended from Irish settlers in Australia.

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