Margaret de Burgh of Lanvalley

✓ Margaret de Burgh, 'of Lanvalley', wife (m. before 27 Feb 1281) of Richard de Burgh, the Red Earl of Ulster; mother of his ten children, including Katherine (wife of Maurice FitzThomas, Earl of Desmond) and Joan; d. 1304. Her parentage is not given by Medieval Lands (commonly made a daughter of John de Burgh of Lanvalley, grandson of Hubert de Burgh, Earl of Kent - not wired). Source: Medieval Lands (fmg.ac, Cawley), 'Ireland' (Earls of Ulster). [DIRECT ANCESTOR OF THE COMPILER: flag added 18 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]