Evolution of the Name:

From the Irish, Mac an Tiernan, the T became silent and said quick became McKiernan, then the Mc was dropped.

Anglicized as:
Often is Masterson. Not in our immidiate family.

Cavan, an O’Rourke / O’ Reilly clan.

Famous People:

Said to be related:
Kitty Kiernan (The Larry Kiernans and our Elizabeth Kiernan were both of Aughagreagh)
Ma said the families are related.

Not Related
Catherina McKiernan (Runner)