 Richard's son Walter de Burgh, 1st Earl of Ulster, his son Richard Óg de Burgh, 2nd Earl of Ulster, and Richard's grandson William Donn de Burgh, 3rd Earl of Ulster all seem to have used the title, but upon the death of the latter in 1333, civil war broke out over control of the de Burgh lands.Connacht was divided between Sir Ulick Burke and Edmond Albanach de Burgh, and the title fell out of use.It was not recognized in the Peerage of Ireland, and the heirs-general of William Donn, who retained the title Earl of Ulster, did not use it.