Meirchion Gul "The Lean" ap Gwrwst, King of Rheged

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Meirchion Gul "The Lean" ap Gwrwst, King of Rheged

Also Known As: "King of /Rheged/", "The Lean", "the Lean", "Gul", ""The Lean"", "King of RHEGED; aka Mairchiongul ap GORWST LEDLUM; `the Lean'", "Meirchion "Gul"", "meaing Meirchion the Lean", "HRM King of Rheged"
Death: before circa 535
Immediate Family:

Son of Gwrwst Ledlwm 'half bare' ap Ceneu, King of Rheged and Ewerich verch Kevenard
Father of Idno ap Meirchion Gul; Cynfarch Oer ap Meirchion Gul, King of North Rheged and Elidir Lydanwyn ap Meirchion, Brenin Rheged
Brother of Dyfnarth ap Gwrwst

Occupation: King
Managed by: Private User
Last Updated:

About Meirchion Gul "The Lean" ap Gwrwst, King of Rheged

See Peter Bartrum, (February 5, 2023; Anne Brannen, curator)

See Darrell Wolcott,, "Pedigree of the Ancient Lords of Ial," for the untangling of these lines. (April 21, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: Rethinking the Gwent Pedigrees; (Steven Ferry, February 20, 2020.)

Please see Darrell Wolcott: Pedigree of the Ancient Lords of Ial; (Steven Ferry, April 6, 2020.)

Please see Darrell Wolcott: Llewelyn ap Hoedliw, Lord of Is Cerdin; (Steven Ferry, September 11, 2020.)

Please see Darrell Wolcott: Harleian Ms 3859; (Steven Ferry, March 8, 2021.)

Please see Darrell Wolcott: Foundations of 'The Men of the North' - Part 2; (Steven Ferry, July 9, 2021.)


ID: I51194

Name: Merichion"Gul" ap GWRWST

Given Name: Merichion"Gul" ap

Surname: Gwrwst

Sex: M

Change Date: 13 MAY 2009


!#4568> Welsh Genealogies Ad 300-1400,-v1-p9*,11 (FHL #6025561);

  1. 2105> Wales Visitations-v2-p104 (FHL Q942.9 D23d);


Birth: 430 in South Reged, Britain

Endowment: 5 JUN 1930

Reference Number: > 283 WEL

Death: Y

Father: Gwrwst "Ledlwm" ap CENEU b: 400 in South Reged, Britain

Marriage 1 Spouse Unknown


Cynfarch "Oer" ap MEIRCHION b: 459 in South Reged, Britain

Elidir "Lydanwyn" ap MEIRCHION b: 457 in South Reged, Britain
Idno ap MEIRCHION b: ABT 455 in , South Reged, Britain

Abbrev: Pedigree Resource File CD 6

Title: Pedigree Resource File CD 6 (Salt Lake City, UT: Intellectual Reserve, Inc., 1999)serve, Inc., 1999)serve, Inc., 1999).


First name aka 'Meirchaum' or Merchiaun'.

Cynfarch Oer (also known as Cunomarcus or Cynfarch ap Meirchion) was probably a 6th century king of the Sub-Roman realm of Rheged, believed to be located in north-west England and south-west Scotland.

Next to nothing is known about Cynfarch. He appears in the Old Welsh pedigrees of the Brythonic 'Men of the North' as the son of the equally obscure Meirchion Gul (Marcianus the Lean) and father of the slightly better documented Urien Rheged. His name was well remembered however and his family were known as the 'Cynferchyn' in his honour. His unflattering epithet Oer means 'the Dismal'.

It is assumed that Cynfarch ruled in Rheged before Urien. Accepting H.M. Chadwick's suggestion that Senyllt ap Dingad was a king of Galloway, expelled to the Isle of Man around 550, David Nash Ford suggests that Cynfarch was his oppressor. Hence the apparent 'Rheged' placename at Dunragit near Stranraer and tales of Mark ap Meirchion (or Cun-mark ap Meirchion) in the same area. He may also have been a participant in the Battle of Arfderydd in 573.

Notes: HRM King Meirchion Gul was probably a late 5th-century king of Rheged, a Brythonic realm in the area of sub-Roman known as the Hen Ogledd (in the North of England and Southern Scotland today). Next to nothing is known about HRM King Meirchion, although his epithet means the Lean. He appears in the Middle Welsh genealogical text Bonedd Gwŷr y Gogledd as the son of the equally obscure Gwrwst Lledlwm, a grandson of Coel Hen, and grandfather of renowned Urien Rheged. He is assumed, like Urien, to have ruled Rheged, including Catterick. His two sons appear at the head of two later dynasties. Cynfarch Oer was Urien's father. Another son, Elidyr Lydanwyn (the Stout and Handsome), was the ruler of Rheged, accoriding to the Gwynedd version of Hywel Dda's 'Welsh laws'. He was the father of Llywarch Hen. Reference: Rachel Bromwich (gol.), Trioedd Ynys Prydein (Cardiff, 1961; republished 1991). Source:

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