Person

William Donn de Burgh, 3rd Earl of Ulster

1312–1333 · 14th century · Also known as William de Burgh, 3rd Earl of Ulster, Brown Earl

William Donn de Burgh, 3rd Earl of Ulster, the 'Brown Earl', was the Anglo-Norman lord of Ulster and much of Connacht. His murder by his own followers at Carrickfergus in 1333 left only an infant daughter, and his kinsmen seized the de Burgh lands in Connacht, founding the Gaelicised lordships of Clanricarde and Mac William Iochtar.

Mentioned in 3 state histories

Earldom of UlsterMac William IochtarClanricarde

See also

Cite this entry
APA
The Epoch Institute. (2026). William Donn de Burgh, 3rd Earl of Ulster. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/william-donn-de-burgh-3rd-earl-of-ulster
MLA
“William Donn de Burgh, 3rd Earl of Ulster.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/william-donn-de-burgh-3rd-earl-of-ulster. Accessed .
Chicago
The Epoch Institute. “William Donn de Burgh, 3rd Earl of Ulster.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/william-donn-de-burgh-3rd-earl-of-ulster.
Harvard
The Epoch Institute (2026) ‘William Donn de Burgh, 3rd Earl of Ulster’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/william-donn-de-burgh-3rd-earl-of-ulster (Accessed: ).

Last reviewed October 2026Random entry ↻