Our common ancestors - High Kings of Ireland - Contents

The High Kings of Ireland

• References:
  • INCHIQUIN in [Burkes Peerage]
  • Table 3 in [Moncreiffe, 1982]

• Sources yet to be consulted:
  • Inchiquin estate papers, Co.Clare, [NLI]

Brian Boru, High King of Ireland, reigned 1002-14,
defeated Vikings at Battle of Clontarf, Co.Dublin, 1014 (in which he was killed),
had issue:

Donnchad O'Brien, King of Munster, had issue:

Dearbforgail O'Brien, had issue:

Murchad, King of Leinster, had issue:

Donnchad, King of Leinster, had issue:

Dermot Mac Murrough, King of Leinster (see here),
mar Mor O'Toole,
abducted Dervorgila, the wife of O'Rourke of Breffni in 1152, not unwillingly for they were lovers, known as the "Rape of Dervorgila",
deposed, went to England to seek help from Henry II, thus inviting the Anglo-Norman invasion of Ireland 1169, led by Strongbow and Maurice Fitzgerald de Windsor,
held Dunamase fort, nr Port Laoise, Co.Laois,
had issue [by Mor O'Toole]:

1. Aoife Mac Murrough, Princess of Leinster (see here),
   mar Richard de Clare, "Strongbow", 2nd Earl of Pembroke and had issue.

Brian Boru is the male-line ancestor of the Kings of Thomond, of whom:

Donnchadh O'Brien, 2nd Earl of Thomond, mar Helen Butler [descendant of Edward I] and had issue:

Margaret O'Brien, mar Diarmaid O'Brien, 2nd Baron of Inchiquin and had issue:

Murchadh O'Brien, 3rd Baron of Inchiquin, mar Mabel Nugent [descendant of Edward III] and had issue:

Murchadh O'Brien, 4th Baron of Inchiquin, mar Margaret Cusack and had issue:

Diarmaid O'Brien, 5th Baron of Inchiquin,
had issue:

1. Mary O'Brien, mar Dr. Michael Boyle, Archbishop of Armagh and had issue.

2. Morrogh O'Brien, 1st Earl of Inchiquin, 6th Baron of Inchiquin.

3. Honora O'Brien, mar Anthony Stoughton and had issue.

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• The oldest branch of the Irish Royal House is found in the O'Neill line.

• Brian Boru is the ancestor of:
  • Every English monarch from Henry IV (succ 1399) to the present day.
  • I used to say here that Richard II (succ 1377) also descended from Brian Boru. I am not sure why I said that. I cannot currently find the evidence for this.

• See also:
  • The descent of Elizabeth I from Butler, Earl of Ormonde
  • The descent of Elizabeth II from Hugh O'Neill and the Kings of Thomond
  • The descent of the future kings of England from Rory O'Moore
  • Royal Descents of many of the great Irish rebels

• Irish royal families
• Royal House of Leinster