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Connor Maguire, 2nd Baron of Enniskillen
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Connor (or Cornelius) Maguire, 2nd Baron of Enniskillen (Irish Conchobhar Mag Uidhir; 1616 – 1645) was an Irish nobleman from Ulster who took part in the Irish Rebellion of 1641. He was executed for high treason.
He was born in County Fermanagh, the son of Sir Bryan Maguire who was created a peer on account of the family loyalty to the English crown. The family was granted land in their traditional power base of Fermanagh by James I, as part of the Ulster Plantation. His mother was an O'Neill, which brought a connection to the leading family of Ulster. He is said to have been partly educated at Magdalen College, Oxford, but did not matriculate in the university.
His brother, Rory Maguire, married into a leading planter family, and sat for Fermanagh in the 1640 Parliament. 
He succeeded to the peerage in 1634, and attended the parliament which met in Dublin on 10 March 1640. In Dublin, during the session in February 1641, he was recruited by rebel Rory O'Moore, who had conceived the plan of freeing Ireland while the English government was busy with Scotland.
In August 1641 he first heard of the plan for seizing Dublin Castle; the chief hope of the conspirators rested on Colonel Owen Roe O'Neill, who served the king of Spain in the Low Countries. The rising was fixed for 23 October but Hugh Oge MacMahon disclosed the plot on the night of the 22nd. Roger More escaped, but Maguire was captured, with MacMahon and Colonel Reade (afterwards Sir John and gentleman of the bedchamber), who had served the king in Scotland. The two latter were racked, but Maguire admitted all the material facts without torture on 26 March 1642, and made a fuller voluntary statement some six months later.
In June 1642, Maguire, MacMahon, and Reade were moved to the Tower of London, and eleven months later they were transferred to Newgate Prison as close prisoners. In October 1643, Reade escaped when Maguire and MacMahon were sent back to the Tower. In August 1644, both prisoners escaped, but were retaken within six weeks. After many delays Maguire was brought to trial in the King's Bench before Justice Francis Bacon in February 1645. MacMahon had already been hanged.
The peerage in Maguire's case made a difficulty, he was a Peer of Ireland and requested a trial of his peers, he was refused this right by William Prynne Esq, "nor indulge him any tryal here or there by his Peers of Ireland (at least of Irish blood) for so horrid a Treason as this" ruling that his decision did not impact future trails of "English Blood" in Ireland. There were precedents for trying in England treasons committed in Ireland. Maguire was tried. Many points of law were raised, but he was sentenced to be hanged, drawn, and quartered. He was a Catholic, but was not allowed a priest, and executed at Tyburn. 
Maguire married Mary, daughter of Thomas Fleming of Castle Fleming, Queen's County (now County Laois), by whom he had a son. The chieftainship of Fermanagh during the civil war fell to his brother Rory, who was killed in the winter of 1648. Descendants direct or collateral were long called Barons of Enniskillen in the service of France or of James II. The last titular lord was a retired captain of Lally's regiment at the outbreak of the revolution in 1789.
Maguire's brother Rory became a Colonel in the Ulster Army of Confederate Ireland and served until his death in a skirmish in 1648.
Sir Phelim Roe O'Neill of Kinard was an Irish politician and soldier who started the Irish rebellion in Ulster on 23 October 1641. He joined the Irish Catholic Confederation in 1642 and fought in the Wars of the Three Kingdoms under his cousin, Owen Roe O'Neill, in the Confederate Ulster Army. After the Cromwellian conquest of Ireland O’Neill went into hiding but was captured, tried and executed in 1653.
The Irish Rebellion of 1641 was an uprising by Irish Catholics in the Kingdom of Ireland, who wanted an end to anti-Catholic discrimination, greater Irish self-governance, and to partially or fully reverse the plantations of Ireland. They also wanted to prevent a possible invasion or takeover by anti-Catholic English Parliamentarians and Scottish Covenanters, who were defying the king, Charles I. It began as an attempted coup d'état by Catholic gentry and military officers, who tried to seize control of the English administration in Ireland. However, it developed into a widespread rebellion and ethnic conflict with English and Scottish Protestant settlers, leading to Scottish military intervention. The rebels eventually founded the Irish Catholic Confederacy.
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Sir Rory O'Moore, also known Sir Roger O'Moore or O'More or Sir Roger Moore, was an Irish landowner of ancient lineage, and is most notable for being one of the four principal organizers of the Irish Rebellion of 1641.
Baron Maguire, of Enniskillen, was a title in the Peerage of Ireland. It was created on 3 March 1628 for Bryan Maguire by Charles I. On 10 February 1645, the second baron was attainted and the barony forfeited.
Heber MacMahon was bishop of Clogher and general in Ulster. He was educated at the Irish college, Douay, and at Louvain, and ordained a Roman Catholic priest 1625. He became bishop of Clogher in 1643 and a leader among the confederate Catholics. As a general of the Ulster army he fought Oliver Cromwell at the Battle of Scarrifholis in 1650. He was defeated, taken prisoner and executed the same year.
Events from the year 1641 in Ireland.
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Colonel Philip O'Reilly was a member of parliament for County Cavan, Ireland in the Irish Parliament from 1639 to 1641, and a leading member of the 1641 Rebellion.
Bryan Roe Maguire, 1st Baron of Enniskillen, was a Gaelic Irish nobleman from Magherastephana, County Fermanagh. He was the son of Connor Roe Maguire, nicknamed "the Queen's Maguire" or "the Traitor Maguire" for his support of Elizabeth I's campaign in the Nine Years' War. Bryan was knighted on 2 February 1626 and made "Lord Maguire, Baron of Enniskillen" by James I on 3 March 1627. The Annals of the Four Masters was compiled under his patronage. His sons Connor Maguire, 2nd Baron and Colonel Rory Maguire died as officers of Confederate Ireland.
The siege of Enniskillen took place at Enniskillen in Fermanagh, Ireland, in 1594 and 1595, during the Nine Years' War. In February 1594, the English had captured Enniskillen Castle from the Irish after a waterborne assault and massacred the defenders after they surrendered. From May 1594, an Irish army under Hugh Maguire and Cormac MacBaron O'Neill besieged the English garrison in the castle, and in August they defeated an English relief force. A second relief force was allowed to resupply the garrison, but the castle remained cut off. Eventually, in May 1595, the English garrison surrendered to the Irish and were then massacred.
The Battle of the Ford of the Biscuits took place in Fermanagh, Ireland on 7 August 1594, during the Nine Years' War. A column of almost 650 English troops led by Sir Henry Duke was ambushed and defeated by a Gaelic Irish force under Hugh Maguire and Cormac MacBaron O'Neill at the Arney River. The English column had been sent to relieve and resupply Enniskillen Castle, which had been under siege by the Irish since May. The English suffered at least 56 killed and 69 wounded, and were forced to make a hasty retreat.
The MacGuire family is an Irish clan based in County Fermanagh. The name derives from the Gaelic Mac Uidhir, which is "son of Odhar" meaning "dun", "dark one". According to legend, this relates to the eleventh descendant of Colla da Chrich, great-grandson of Cormac mac Airt, who was monarch of Ireland about the middle of the third century. From the 13th to the 17th centuries, the MacGuires were kings of Fermanagh.
The Battle of Belleek, also known as the Battle of the Erne Fords, was fought on the River Erne near Belleek in Fermanagh, Ireland, on 10 October 1593. It was part of the buildup to the Nine Years' War. The battle was fought between a Gaelic Irish army under Hugh Maguire, lord of Fermanagh—who had begun a revolt against the English—and an English Crown expeditionary force under Sir Henry Bagenal, supported by Hugh O'Neill, Earl of Tyrone. Maguire's force was defeated, but the bulk of his army was unscathed. Hugh O'Neill would later join Maguire in war against the English.
Roger Maguire, styled Lord Maguire of Enniskillen, was an Irish Jacobite soldier and courtier.
Colonel Rory Maguire was an Irish politician and soldier. He was a leading instigator of the Irish Rebellion of 1641 and subsequently participated in the Irish Confederate Wars as a senior Confederate commander.
Sir William Cole was an English soldier and politician, who participated in the Plantation of Ulster and established a settler town at Enniskillen, County Fermanagh. Despite his initial loyalty to the Stuarts, he was a leading English Parliamentarian figure in the Irish Confederate Wars of the 1640s.