Toirdhealbhach Donn Ó Briain

Ó Briain, the son of Tadhg an Chomhaid Ó Briain, took over after the death of his uncle, Toirdhealbhach Óg Ó Briain.

In 1504, he supported Ulick Fionn Burke against Gerald FitzGerald at the Battle of Knockdoe and was defeated. In 1510, he defeated the forces of Gerald FitzGerald, who was invading Thomond with a large army, at Moin na m-brathar, near Limerick.

Toirdhealbhach Donn Ó Briain died in 1528 and was succeeded by his son, Conchobhar.^[2]

Ó Briain married, firstly, Joan, daughter of Thomas Fitzmaurice, 8th Lord of Kerry. They had no known children. He married, secondly Raghnailt (died 1486),^[2] daughter of Seán mac Conmara. They had children:^[3]

• Conchobhar
• Donnchadh
• Murchadh Carrach
• Tadhg (Killed 1523, by shot of ball at Ath-an-Chamais, upon the River Suir, by Piers Ruadh Butler.)
• Diarmaid
• Margaret (married Eoghain Ó Ruairc (O'Rourkes of Dromahair))
• Sláine (married Éinri Óg mac Éinri Ó Neill, King of Tír Eoghain)
• Fionnuala (married Manus O'Donnell, King of Tír Chonaill)