William de was born on September 17th, 1312.1 He died at the age of 20 on June 6th, 1333 in Ireland.1
General Notes
[316552.ftw]
4th Earl of Ulster Knight lord of Connaught in Ireland and Clare in England CAUS murdered TITL Plantagenet Ancestry of 17th Century Colonists AUTH David /Faris/ PUBL Genealogical Publishing Company, 1996 First Edition PAGE p. 43