Sir John Clotworthy’s Regiment of Foot

Active1642 to 1653
ConflictsIrish Confederate War
ColonelSir John Clotworthy
Owen O’ Connelly
Leonard Lytcott
Robert Russell
Area RaisedAntrim
Coat ColourRed?
Flag Colour
Flag Design
Field Armies

Later Colonel Owen O’ Connelly’s, Leonard Lytcott’s and Robert Russell’s Regiment of Foot

Known as the Antrim Regiment, they served throughout the Irish Confederate War

Service History


  • Raised in Ulster
  • January: One months pay for the officers plus arms and ammunition sent to Knockfergus.1)
  • May: Raid around Lough Beg and Apperly Hills together with the Covenanters
  • June: Taking of Fort Mountjoy?
  • July: Detachment of 500 assigned to force intended to march on Limerick2)





  • February: O' Connolly commissioned Colonel of Clotworthy's regiment3)


  • May: O’ Connolly appointed to command a regiment formed out of Fairfax’s Army
  • Army politics prevent O’ Connolly’s regiment’s formation
  • July: Sir John Clotworthy impeached by the army
  • July: O’ Connolly probably takes over Clotworthy’s after his impeachment
  • August: James Clotworthy leading horse under Michael Jones at Dungan’s Hill



  • August: Battle of Rathmines?
  • August: Garrison of Dublin
  • October: O’ Connolly killed in a skirmish in Ulster, replaced by Lytcott


  • April: Lytcott and others authorised to raise 1600 men for service in Ulster
  • July: Lytcott sent instead to Scotland, replaced by Russell


  • August to May 1652: Siege of Galway


  • October: Take surrender of Connaught Confederates


  • Disbanded


A history of the regiment is given in The Regimental History of Cromwell's Army by Sir Charles Firth and Godfrey Davies, Clarendon Press, Oxford, 1940

The regiment were formed in 1642 in Antrim. They served under Clotworthy throughout the Irish Confederate War until 1647 or 1648, when Sir John was impeached by the army for Presbyterianism and the regiment appear to have split up, some joining Ormond and some Parliament. James Clotworthy, brother of Sir John, was Lt Col but by 1647 was leading 500 horse under Michael Jones and had been replaced by Owen O’ Connelly. O’ Connelly led a regiment of foot in Parliament’s service by 1649 which were probably formed from the remnants of Clotworthy’s.

O’ Connolly was replaced briefly by Leonard Lytcott, then by Robert Russell, who led the regiment to the siege of Galway, ending in the defeat of the Irish Catholic Confederacy, then to mop up opposition in Connaught. In 1653 the regiment were disbanded.

Coats, Flags and Equipment

In January 1642 1000 muskets and 1500 swords were ordered to be sent to Conway's and Clotworthy's regiments, but these didn't arrive until March 4)

Notable Officers

A list of the unit's officers is shown in Army List of the Ulster British Forces, 1642-1646. by Kevin Forkan. Archivium Hibernicum, Vol. 59 (2005), pp. 51-65 available via JSTOR

Sir John Clotworthy

James Clotworthy

Lieutenant Colonel to his brother and de facto leader of the regiment much of the time.

Owen O’ Connelly

A protestant convert, he betrayed the plot to surprise Dublin Castle at the outbreak of the Irish rebellion in October 1641. Serving in Clotworthy's regiment as a captain, he rose to the colonelcy, but was killed in a skirmish in 1649. He was said to be as stout as could be desired, but of no more conduct than a man hot ire'd

Leonard Lytcott

Lytcott served as a captain under Clotworthy, and later a colonel in Scotland

Robert Russell

A captain under Clotworthy, he became the final colonel of the regiment.

Officer Lists

June 1643

  • Lieutenant Colonel Thomas Cooke
  • Major Fulke Ellis
  • Captain James Clotworthy
  • Captain Owen O'Conally
  • Captain Leonard Lytcott
  • Captain Robert Russell
  • Captain Roger Langford knt
  • Captain Willaim Bowleigh


  • 1641-2: 1000 men to be raised5)
  • May 1642: 500 men

See Also

1) N.A. SP28/1B/329
2) Journals of the House of Lords V 226
3) CSPI 1622-47, p437
4) An English Army for Ireland by Ian Ryder. Partizan Press
5) Historical Manuscripts Commission, Fourteenth Report, Appendix, Part VII, The Manuscripts of the Marquis of Ormonde