Colonel Roger Mostyn’s Regiment of Foot

ConflictsFirst Civil War
ColonelRoger Mostyn
Coat Colour
Area RaisedFlint
Flag Colour
Flag Design
Field ArmiesGarrison

Royalist foot regiment in garrison at Hawarden, Chester, then Flint Castle

Service History


  • January: Colonel Mostyn brings Welsh recruits to Chester
  • November: Surrender of Hawarden Castle?
  • November: Besieged at Flint Castle, surrendered to Brereton
  • November: Loss of Mostyn
  • November to December: Siege of Hawarden Castle



  • January to February: Besieged at Chester
  • March to September: Besieged at Chester
  • September: Battle of Rowton Heath?
  • September to February 1646: Besieged at Chester
  • Mostyn recruits 160 men in Ireland, returning by January 1646


  • January: Skirmish at Ruthin
  • February: Surrender of Chester
  • May to August: Besieged at Flint Castle
  • October: Mostyn surrenders at Denbigh Castle


Probably formed from men of the Flintshire Trained Bands.

Coats, Flags and Equipment

Notable Officers

Colonel Roger Mostyn

Roger Mostyn, knighted after the Restoration.

Officer Lists

From original research by Victor Judge aka BCW user 1642

  • Colonel Roger Mostyn
  • Lieutenant Colonel Peter Griffith Add.Mss. 33590
  • Sargeant Major Thomas Vaughan Add.Mss. 33590
  • Captain Thomas Price I.O. Flintshire
  • Captain William Wynne I.O. Flintshire + Add.Mss. 33590
  • Captain Peter Mostyn I.O. Flintshire + Add.Mss.33590
  • Captain James Llewellyn Ment. I.O.
  • Captain John Foulkes B.L.B. No’s. 692,3. (mw. at Chester Nov. 1645)
  • Lieutenant Ithell Jones I.O. Flintshire to Capt. Llewellyn + Add. Mss. 33590
  • Lieutenant Edward Williams I.O. Flintshire + Add.Mss.33590
  • Lieutenant Brown B.L.B. No. 687
  • Lieutenant Malby B.L.B. No. 687
  • Lieutenant John Price B.L.B. No’s.692,3
  • Ensign John Peirce/Pearce I.O. Flintshire to Capt. Mostyn + Add.Mss.33590
  • Ensign Thomas Powell I.O. Flintshire + Add.Mss 33590
  • Ensign Richard Griffith I.O. Flintshire

Contemporary References

From original research by Victor Judge aka BCW user 1642


From Chester Letters tell us, that on Friday May 22nd.1646 about 12 a clock in the night CR 2017/C9/90 [Sir] Roger Mostyn, William Mostyn and Peter Griffith [paper torn away at this juncture] in Flint to John Lord Byron “Field-Marshall Generall of his Majesty's forces in theis partes”, 4th May 1644.

BLB Letters

BLB 679 Capt. James Llewelyn letter 15.10.1645

Thomas Rogers letter BLB680

Rinald David BLB681

Peter Griffith BLB 685 & 686

Rog. Mostyn to Maj Thos Vaughan BLB687

Denbigh Articles

National Library of Wales Brogyntyn Mss TH7/2/8 Resolved Sir,

That Col. Roger Mostyn late Governor of Flint Castle and the Governor and others in Denbigh Castle at the surrendering thereof shall have the liberty to compound for the delinquency at such rates as if they had come in before the 1st December last,and that this liberty shall extend to all but such as being under the first and second expression are exempted from pardon.

Mystery Manuscript

Pennant mentions a manuscript called Account of the Rebellion in North and South Wales in the last Century 1642-1652 written in Welsh in the Mostyn Library, but upon contacting the Mostyn Estate it does not appear in their catalogue.

Flint deliquents


Information of Col: Bingham of Col: Bosevile that Raphael Davies gent. of Whitford Parish in the County of Flynt & Thomas Mostin of the County gent. are delinquents and papists, & left their houses and homes and lived in Flint Castle in the County of Flynt then kept against the Parliament. July 13th 1649

Y Cwtta Cyfarwydd

The Chronicle written by the famous Clarke, Peter Roberts 1607-1646 Md' that upon Tuesday being the XXVth of November 1645 Captayne John Ffoulkes (haveing receaved his mortall wound at the siege of West Chester in the tyme of the warres) was buried at that Citie, by Report. Vaynol 1645 Bur' Captain John Ffoulkes

Rhytherch ap Edward's Petition

XQS/1660/75 Michaelmas 1660 To the right honourable Justices of ye Peace for ye County of Carnarvon The humble petition of Rhytherch ap Edward of Treos in ye Commote and County aforesaid

Humbly sheweth that your petitioner is and hath ben for many yeares heretofore a resident within ye said County and from thence sent to the service of Ireland and also hath served as a souldier in ye service of his late Majesty against ye Parliament under ye command of Coll: Roger Mostyn of dol y Corslyn, whom certificate to that purpose is hereunto annexed. And your petitioner having bruises and infirmities by reason thereof which hath made him incapable at present to followe his former calling whereby to gain his livelihood and save himself from extreame want for ye petitioner. Whereof your petitioner humbly prayeth that he may be admitted to receave an yearly pension out of ye maimed souldiers mize as it shall seem meet unto your woorships and your petitioner shall ever pray.

XQS/1660/74 These are to certifie whom it may concerne that ye bearer hereof Rhytherch ap Edward hath served his late Majesty severall yeares in Ireland and likewise in England under my command wherein he behaved himself faithfully and dutifully. Witness my hand

20. of August 1660 Roger Mostyn


  • Raised 1500 men for the King in 12 hours, according to Whitelocke
  • Around 300 at Chester in April 1645, according to Byron

See Also