Maud of Lancaster, Countess of Ulster

Maud of Lancaster, Countess of Ulster was an English noblewoman and the wife of William Donn de Burgh, 3rd Earl of Ulster. She was the mother of Elizabeth de Burgh, suo jure Countess of Ulster. Her second husband was Sir Ralph de Ufford, Justiciar of Ireland. Their daughter was Maud de Ufford, Countess of Oxford. After Ufford's death, Maud became a canoness at an Augustinian nunnery, Campsey Priory, in Suffolk.