William de Burgh

William de Burgh ( , ; ; –winter 1205/06) was the founder of the House of Burgh (later surnamed Burke or Bourke) in Ireland and elder brother of Hubert de Burgh, 1st Earl of Kent and Geoffrey de Burgh, Bishop of Ely. William is often given the epithet, "the conqueror", but is not to be confused with the English king of the same nickname.

In Ireland

William de Burgh was the eldest son of Walter de Burgh and his wife, Alice, of Burgh-next-Aylsham, Norfolk, and had three brothers: Hubert, Earl of Kent; Geoffrey, Bishop of Ely; and Thomas, Castellan of Norwich. Ellis has made a case that William's father was Walter de Burgh but notes this is "highly conjectural".

Henry II of England appointed him Governor of Limerick and granted him vast estates in Leinster and Munster. William de Burgh's lands were centred along the River Suir from Tibberaghny to Clonmel and around Kilfeakle in Tipperary, and along the River Shannon from Limerick to Lough Derg. His castles at Tibberaghny (County Kilkenny), Kilsheelan, Ardpatrick and Kilfeacle were used to protect King John's northern borders of Waterford and Lismore whilst his castles at Carrigogunnell and Castleconnell were used to protect Limerick. He was granted Tibberaghny Castle in 1200, and was Seneschal (Royal Governor) of Munster from 1201 to 1203. This alliance probably took place during the reign of Muirchertach, since Domnall Mór had been at war with the Normans until his death. At any rate no more wars are recorded between the two sides for the rest of the decade. According to the Annals of Inisfallen, in 1201, William and the sons of Domnall Mór led a major joint military expedition into Desmond, slaying Amlaíb Ua Donnabáin among others.

Between 1199 and 1202, William de Burgh led military campaigns in Desmond (with the aid of the Ó Briain). Success in the west and south allowed de Burgh to conquer the Kingdom of Connacht which, though he had been granted (probably before 1195) by John, he had never occupied. The King of Connacht, Cathal Crobhdearg Ua Conchobair (O'Connor), fought a successful counter-attack against Anglo-Norman castles in Munster (including de Burgh's castle of Castleconnell). Further fighting led to the loss of three castles and property, all of which was eventually retrieved (with the exception of much of Connacht). The Annals of the Four Masters recorded his passing thus: "William Burke plundered Connacht, as well churches as territories; but God and the saints took vengeance on him for that; for he died of a singular disease, too shameful to be described."

Family William de Burgh's wife was the daughter of Domnall Mór Ó Briain, King of Thomond, whom he married in around 1193. A late medieval genealogy found in the Book of Lecan (dated c.1397-1418) records his marriage to an unnamed daughter of Donmal Mor mac Turlough O'Brien, and the descent of the Earls of Ulster and Clanricarde from their son Richard. William de Burgh had three sons and at least one daughter:

Richard Mór de Burgh, 1st Lord of Connaught Hubert de Burgh, Bishop of Limerick William de Burgh (the younger), Sheriff of Connacht

Genealogy