Tighearna Names
in Irish Annals:

Annula Rioghachta Eireann
(Annals of the Four Masters)

This 1944 Irish stamp design commemorates the 300th Anniversary of the death of Michael O'Clery. The inscription reads "To the Glory of God, and the Honor of Ireland"

The four masters were Michael (Tadhg) O'Clery, his cousin Peregrinie (Cucogry) O'Clery, Fearfasa O'Mulconry, and Peregrine O'Duigenan.

The Annals were compiled between 1632 and 1636 and are preserved by the Franciscans in Switzerland.

Listed below are links to the various entries with names or surnames based on Tighearna. 

You will notice the given name Tighearn (Tiernan) was a favorite of the Ua Ruairc (O'Rourke) and the Ua Conchobhair (O'Conor) familes.

You will also notice that Tighearnach (Tierney) was a more common name connected with the clergy than Tighearnan (Tiernan).

There are a number of later references to the surname Mac Tighearnain (Mc Tiernan), but only one for the surname Ua Tighearnaigh (O'Tierney)

Names based on Tighearna
Four Masters 1 (M3579.1 to M1098.8).

The Exploits of Tighearnan Ua Ruairc
Four Masters 2 (M1102.6 to M1172.4)

Names and Surnames based on Tighearna
Four Masters 3 (M1172.3 to M1424.11).

Names and Surnames based on Tighearna
Four Masters 4 (M1425.8 to M1602.30).
 

Annula Ulaid
(Annals of Ulster)

Names Based on Tighearna
(U549.2 to U1281.7)

Names Based on Tighearna
(U1290.6 to U1536.23)