List of Famous people with last name Briain

Toirdhealbhach Donn Ó Briain was King of Thomond from 1499 to his death in 1528.

Donnchadh mac Briain, son of Brian Bóruma and Gormflaith ingen Murchada, was King of Munster.

Toirdhealbhach Bóg Ó Briain was King of Thomond from 1446 to his death in 1459.

Muircheartach Ua Briain, son of Toirdelbach Ua Briain and great-grandson of Brian Boru, was King of Munster and later self-declared High King of Ireland.

Tadc mac Briain was the son of Brian Boru and Echrad, daughter of Carlus mac Ailella of Uí Áeda Odba. Tadc had one son, Toirdelbach Ua Briain, with his wife Mór, daughter of Gilla Brigte Ua Maíl Muaid of Cenél Fiachach.

Brian Sreamhach Ua Briain, also known as Briain Catha-an-Aonaigh Ó Briain, and Brian Ó Briain, was King of Thomond from 1369 to 1400. He was the son of Mathghamhain Maonmhaighe Ó Briain. In about 1370 or 1371, he defeated and captured Gerald FitzGerald, 3rd Earl of Desmond near Limerick. On his death in 1400 he was succeeded by his brother Conchobhar, who was succeeded on his death in 1426 by Brian's son Tadhg na Glaoidh Mór.

Tadhg an Chomhaid Ó Briain was King of Thomond from 1459 to his death in 1466.

Muircheartach Ó Briain was King of Thomond from 1317 until his death in 1343.

Toirdhealbhach Ua Briain, anglicised Turlough O'Brien, was King of Munster and effectively High King of Ireland. A grandson of Brian Bóruma, Toirdelbach was the son of Tadc mac Briain who was killed in 1023 by his half-brother Donnchad mac Briain.

Mathghamhain Maonmhaighe Ó Briain was King of Thomond during 1360-69.