She is married to Maurice FitzThomas.
They got married on August 5, 1312 at Green Castle, Down, Ireland (1st wife).Source 1
He [Morice Fitz Thomas] married 1stly, 5 August 1312, at Green Castle,co. Down, Katherine, 6th daughter of Richard (DE BURGH), EARL OF ULSTER,by Margaret, his wife. She died about 1 November 1331, at Dublin.[Complete Peerage IV:237-40, XIV:255, (transcribed by Dave Utzinger)]
Katherine de Burgh | ||||||||||||||||||
1312 | ||||||||||||||||||
Maurice FitzThomas |