Biography.guide
Home › People › Military leader › Rory O'More, Lord of Laois
Portrait of Rory O'More, Lord of Laois

Rory O'More, Lord of Laois

1600 – 1655

Organizer of the Irish Rebellion of 1641

Don't just read it — keep itBiographies to ownE-book · Audio · Video From $7 →

About Rory O'More, Lord of Laois

Lived 1600 – 1655. Rory O'More, Lord of Laois was a military leader.

Sir Rory O'Moore (; c. 1600 – 16 February 1655), also known Sir Roger O'Moore or O'More or Sir Roger Moore, was an Irish landowner, and is most notable for being one of the four principal organisers of the Irish Rebellion of 1641.

Early life O'Moore belonged to an ancient Irish noble family descended from Conall Cernach. He was born in either Laois around 1600, or more likely at Balyna, his father's estate in County Kildare, about 4km west of Johnstownbridge. His father was Calvagh O'More, son of nobleman Rory Caoch O'More, and his mother was Margaret Scurlock (Sherlock).

Leader of the Rebellion of 1641

Given the causes of the rebellion and the Crown's weakness during the Bishops' Wars into 1641, O'More planned a bloodless coup to overthrow the English government in Ireland.

On 5th October 1641 he met at Loughross with Connor Maguire, 2nd Baron of Enniskillen, Heber McMahon then the Vicar of Clougher, Sir Phelim O'Neill and Captain Turlough O'Neill. They planned to seize Dublin Castle, that was held by a small garrison, on 23 October 1641. Allies in Ulster led by Sir Phelim O'Neill would seize forts and towns there. The leaders would then assume the governing of their own country and with this provision offer allegiance to King Charles. They were betrayed, and the plan was discovered on 22 October and the rising failed in its first objective. O'Neill had some success in Ulster, and O'More quickly succeeded in creating for the first time a military alliance between the Ulster Gaelic clans and the Old English gentry in the Pale of Leinster.

This alliance was arranged at a meeting on 15 December 1641 at Knocklofty, near Duleek, between O'Moore and Lords Gormanston, Fingall, Slane and Dunsany who were prominent in County Meath.

In November 1641 the Irish forces besieged Drogheda and a royalist force came north from Dublin to oppose them. O'More was one of the leaders of the rebel army that intercepted and defeated the relief force at the Battle of Julianstown on 29 November. The Kildare rebels did not stop the occupation of Naas by a royalist force in February 1642, and then in April they lost the Battle of Kilrush. By the stage O'Moore was more of a politician in the evolving management of Confederate Ireland that lasted for another decade.

In the ensuing Irish Confederate Wars, a major achievement by O’Moore was to recruit Owen Roe O'Neill from the Spanish service in 1642. He commanded the Confederate forces in what is now County Laois and County Offaly, which remained peaceful, and helped arrange alliances with Inchiquin in 1647 and Ormonde in 1648. The resulting larger alliance failed to stop the Cromwellian invasion of Ireland (1649–53), by the end of which an estimated one-third of the Irish population had died.

The Irish historian Charles Gavan Duffy wrote:

Gavan Duffy's comment about "no resources" ignored that O'Moore owned over 3,000 acres (1,235 Ha.) of land in Carbury barony, and his other great importance in 1641 was his descent from prominent families of Gaelic and Old English ancestry.

Final years Bishop Michael Comerford wrote that after O'More's defeat at the Battle of Kilrush in April 1642 he retired and died in Kilkenny city in the winter of 1642–43, having co-founded the Irish Catholic Confederation there a few months earlier. However this ignores his contacts with Inchiquin and Ormonde in 1647–48. Others say that he fled to the island of Inishbofin, County Galway after Galway city fell in 1652. St Colman's Church on the island once bore a tablet with the inscription:

Comerford quoted earlier historians who wrote that a similar watchword in Kildare was: "Our trust is in God and Our Lady, and Rory O'More".

Family O'More married Jane, daughter of Sir Patrick Barnewall, of Donabate, County Dublin and his second wife Mary Bagenal, and they had two sons and four daughters.

The Balyna estate was inherited from Calvagh O'More by Rory's brother Lewis. Balyna was passed down to Lewis' last surviving O'More descendant, Letitia, who was also descended from Rory O'More because her grandfather married a second cousin. Letitia married a Richard Farrell in 1751: this Farrell family henceforth took the surname More O'Ferrall.

His daughter Anne, married Patrick Sarsfield from an Old English Catholic family from The Pale. His grandsons included Patrick Sarsfield, 1st Earl of Lucan, who led a Jacobite force in the Williamite War in Ireland, and his brother William Sarsfield, whose descendants include all the Earls of Lucan and the 4th and all subsequent Earls Spencer, through which Rory is an ancestor to Diana, Princess of Wales.

Following the Irish War of Independence, the 1861 "Victoria & Albert Bridge" across the River Liffey in Dublin, was renamed the Rory O'More Bridge in honour of him.

Family tree

Depiction in film The film Rory O'More, made by the Kalem Company in 1911, directed by Sidney Olcott and Robert G. Vignola, set O'More's rebellion in 1798 rather than the 17th century, and moved the action to the Lakes of Killarney. O'More is portrayed in the film by Jack J. Clark.

Biography shop

Don’t just read it —
keep it.

Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.

  • E-book
  • Audio
  • Video
Browse the shop — from $7

Instant download · yours to keep · every purchase keeps this site free

Important facts

Born
1600
Birth century
Occupation
Also known as
Ruairí Ó Mórdha, Roger O'Moore, Roger O'More, Sir Roger Moore, Ruairi O Mordha

People in Rory O'More, Lord of Laois's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Rory O'More, Lord of Laois's

Frequently asked questions

Who was Rory O'More, Lord of Laois?

Organizer of the Irish Rebellion of 1641

When was Rory O'More, Lord of Laois born?

Rory O'More, Lord of Laois was born in 1600.

When did Rory O'More, Lord of Laois die?

Rory O'More, Lord of Laois died on 16 February 1655.

What was Rory O'More, Lord of Laois's occupation?

Rory O'More, Lord of Laois was a military leader.

Sources & further reading

· Wikipedia: Rory O'More, Lord of Laois

· Wikidata: Q7366933

· DBpedia: Rory O'Moore

Cite this page

APA: Biography.guide. (2026). Rory O'More, Lord of Laois. https://biography.guide/rory-o-more-lord-of-laois/

MLA: "Rory O'More, Lord of Laois." Biography.guide, https://biography.guide/rory-o-more-lord-of-laois/.

Chicago: "Rory O'More, Lord of Laois." Biography.guide. https://biography.guide/rory-o-more-lord-of-laois/.

Data last updated: 2026-09-20 · Spot an error? Report a correction.

Page generated 2026-09-27 05:34 UTC